If you are working on a Polymer80 build or even wanting to overhaul your existing Glock, there are a ton of parts on eBay.  You can find some good deals but I would recommend you stick with reputable brands and sellers. For the sellers, I would look for lots of sales – at least over 30 and ideally hundreds – and very good scores.  There are cheap imports/knock-offs showing up so beware no-name stuff.

The following are all real-time listing on eBay so you can go there and find parts.

Glock 27 OEM Style Slide Std Sights Black G27 Gen 3 940SC Polymer 80 OEM - USA

$144.99 End Date: Wednesday Nov-13-2019 12:14:51 PST Buy It Now for only: $144.99 Buy It Now | Add to watch list

Glock 19 Slide G19 P80 Polymer 80 Compatible Gen 3

$169.99 End Date: Saturday Nov-2-2019 9:36:53 PDT Buy It Now for only: $169.99 Buy It Now | Add to watch list

Glock 27 Raptor Series Slide w/ Std Sight Black G27 Gen 3 940SC Polymer 80

$209.99 End Date: Tuesday Oct-22-2019 12:06:02 PDT Buy It Now for only: $209.99 Buy It Now | Add to watch list

Polymer 80 PF940C Glock 19 rail protector

$30.00 End Date: Monday Oct-28-2019 7:35:35 PDT Buy It Now for only: $30.00 Buy It Now | Add to watch list

SCA Karve Slide for Glock 19 Gen 3 Battleworn Gray slide w/RMR Cut Polymer 80

$299.99 End Date: Friday Nov-1-2019 15:27:35 PDT Buy It Now for only: $299.99 Buy It Now | Add to watch list

CUSTOM SLIDE | STAINLESS STEEL BLACK CERAKOTE - FOR GLOCK 19 GEN 1,2,3,Polymer80

$150.00 End Date: Sunday Oct-20-2019 14:52:00 PDT Buy It Now for only: $150.00 Buy It Now | Add to watch list

Glock 27 OEM Style Slide Std Sights Black G27 Gen 3 940SC Polymer 80 OEM Style

$159.99 End Date: Tuesday Oct-22-2019 12:15:34 PDT Buy It Now for only: $159.99 Buy It Now | Add to watch list

p80 Glock 17/22/33/34/35 Gen3 Kit

$219.00 End Date: Saturday Nov-16-2019 10:10:17 PST Buy It Now for only: $219.00 Buy It Now | Add to watch list

Slide for Glock 19 Polymer80 Gen 3 Smooth Satin with Front and Rear Sight Cuts

$159.95 End Date: Saturday Oct-19-2019 19:57:47 PDT Buy It Now for only: $159.95 Buy It Now | Add to watch list

Polymer 80 Frame Completion Kit w/ Shadow Systems Elite Trigger Fits P80 PF940C

$149.00 End Date: Monday Oct-28-2019 20:45:45 PDT Buy It Now for only: $149.00 Buy It Now | Add to watch list

Steel City Arsenal 9mm Upper Parts Kit for Glock Gen 1-4 Polymer 80 w/Liner Tool

$79.99 End Date: Sunday Nov-17-2019 16:11:31 PST Buy It Now for only: $79.99 Buy It Now | Add to watch list

Glock 23 Complete OEM Slide - Gen 3 G23 Factory Upper - Use for P80 Polymer80

$194.00 (1 Bid) End Date: Friday Oct-25-2019 8:33:56 PDT Bid now | Add to watch list

Polymer80 PFPSKITBL PF-Series Black/Gray Slide Parts Kit For Glock Gen 1-4

$95.00 End Date: Sunday Nov-17-2019 13:48:14 PST Buy It Now for only: $95.00 Buy It Now | Add to watch list

Polymer80 PF940v2 & PF940C Magwell - High Profile - ISLE MFG

$25.99 End Date: Friday Nov-1-2019 7:12:54 PDT Buy It Now for only: $25.99 Buy It Now | Add to watch list

COMPLETE G27 Gen 4 OEM Slide / Upper +Two 9 Round Magazines G 3 .40S

$485.00 End Date: Friday Oct-25-2019 23:05:57 PDT Buy It Now for only: $485.00 Buy It Now | Add to watch list

Polymer80 PF940v2 & PF940C Magwell - Low Profile - ISLE MFG

$25.99 End Date: Thursday Nov-7-2019 12:16:41 PST Buy It Now for only: $25.99 Buy It Now | Add to watch list

Glock 19 OEM Style Slide Std Sights Black G19 Gen 3 940C Polymer 80 OEM Style

$159.99 End Date: Tuesday Oct-22-2019 12:18:21 PDT Buy It Now for only: $159.99 Buy It Now | Add to watch list

Polymer80 PF940v2 & PF940C Magwell - Low Profile - ISLE MFG

$25.99 End Date: Thursday Nov-7-2019 12:16:41 PST Buy It Now for only: $25.99 Buy It Now | Add to watch list

POLYMER80 CPCTBLKRE Trigger BLACK / RED for Glock 17 19 22 23 Gen 1 2 3 4

$94.95 End Date: Friday Nov-8-2019 17:50:02 PST Buy It Now for only: $94.95 Buy It Now | Add to watch list

Alpha Se7en Compact Aluminum Flared Magwell for Polymer 80 PF940C | PF940V2 P80

$35.99 End Date: Wednesday Oct-23-2019 19:11:23 PDT Buy It Now for only: $35.99 Buy It Now | Add to watch list

For GLOCK Gen 1-3 G17 or Polymer 80 Lower Parts Kit OEM 9 millimeter Choose Kit

$79.95 End Date: Monday Nov-18-2019 7:05:17 PST Buy It Now for only: $79.95 Buy It Now | Add to watch list

Full Replacement Parts Kit For Gen-3 Glock 17 Polymer-80 Spectre PF940-v2 LPK

$91.97 End Date: Sunday Oct-20-2019 17:10:48 PDT Buy It Now for only: $91.97 Buy It Now | Add to watch list

For GLOCK Gen 1-3 G17 or Polymer 80 Lower Parts Kit OEM 9 millimeter Choose Kit

$48.00 End Date: Monday Nov-18-2019 7:05:17 PST Buy It Now for only: $48.00 Buy It Now | Add to watch list

Glock 17 Nitride Barrel G17 Gen 1 2 3 4 P80 Polymer 80 PF940v2 & PF940CL 9MM

$62.99 End Date: Monday Nov-18-2019 13:22:40 PST Buy It Now for only: $62.99 Buy It Now | Add to watch list

Slide for Glock 19 Gen3, Polymer80 w/ Dovetail, Angled Serrations, NitrideBlack+

$149.95 End Date: Sunday Nov-3-2019 19:23:01 PST Buy It Now for only: $149.95 Buy It Now | Add to watch list

Custom Slide - For Glock 19 GEN 1,2,3, & Polymer80 Stainless Steel - BRAND NEW

$155.00 End Date: Sunday Nov-10-2019 14:31:33 PST Buy It Now for only: $155.00 Buy It Now | Add to watch list

P80 Polymer 80 PF upper slide parts kit completion Bronze Red NEW

$149.99 End Date: Tuesday Nov-5-2019 10:28:18 PST Buy It Now for only: $149.99 Buy It Now | Add to watch list

Polymer80 PF940v2 & PF940C Magwell - Low Profile - ISLE MFG

$25.99 End Date: Thursday Nov-7-2019 12:16:41 PST Buy It Now for only: $25.99 Buy It Now | Add to watch list

Extended Magwell for Polymer 80 Glock Frame

$20.00 End Date: Monday Nov-18-2019 12:48:04 PST Buy It Now for only: $20.00 Buy It Now | Add to watch list

Steel City Arsenal Magwell for Polymer80 PF940V2 Full Size Frame Battleworn Gray

$79.99 End Date: Sunday Nov-17-2019 16:11:26 PST Buy It Now for only: $79.99 Buy It Now | Add to watch list

Polymer80 PF940v2 & PF940C Magwell - Low Profile - ISLE MFG

$24.99 End Date: Thursday Nov-7-2019 12:16:41 PST Buy It Now for only: $24.99 Buy It Now | Add to watch list

CUSTOM SERRATTED SLIDE FOR GLOCK 19 GEN1,2,3,Poly80 | RMR Cut For Trijicon

$185.00 End Date: Sunday Nov-3-2019 21:05:31 PST Buy It Now for only: $185.00 Buy It Now | Add to watch list

Polymer80 PF940v2 & PF940C Magwell - High Profile - ISLE MFG

$24.99 End Date: Friday Nov-1-2019 7:12:54 PDT Buy It Now for only: $24.99 Buy It Now | Add to watch list

CUSTOM SLIDE | MATERIAL 17-4 PH BLACK CERAKOTE - FOR GLOCK 19 GEN 1,2,3

$180.00 End Date: Wednesday Nov-13-2019 16:26:42 PST Buy It Now for only: $180.00 Buy It Now | Add to watch list

Steel City Arsenal Magwell for Polymer80 PF940V2 Full Size Frame Battleworn Gold

$79.99 End Date: Sunday Nov-17-2019 16:11:26 PST Buy It Now for only: $79.99 Buy It Now | Add to watch list

Polymer80 PF940v2 & PF940C Magwell - Low Profile - ISLE MFG

$25.99 End Date: Thursday Nov-7-2019 12:16:41 PST Buy It Now for only: $25.99 Buy It Now | Add to watch list

Glock OEM Lower Frame Parts Kits For Glock Gen 1-3 G17 And Polymer 80

$50.95 End Date: Sunday Nov-3-2019 18:28:01 PST Buy It Now for only: $50.95 Buy It Now | Add to watch list

Glock 26 Gen 3/4 Slide with Trijicon RMR Optics Cut, Black Nitride Finish

$125.00 (1 Bid) End Date: Saturday Oct-19-2019 12:08:16 PDT Bid now | Add to watch list

Full Replacement Parts Kit For Gen-3 Glock 17 Polymer-80 Spectre PF940-v2 LPK

$50.90 End Date: Sunday Oct-20-2019 17:10:48 PDT Buy It Now for only: $50.90 Buy It Now | Add to watch list

Full Replacement Parts Kit For Gen-3 Glock 17 Polymer-80 Spectre PF940-v2 LPK

$37.97 End Date: Sunday Oct-20-2019 17:10:48 PDT Buy It Now for only: $37.97 Buy It Now | Add to watch list

If you find this post useful, please either buy something using one of the links to eBay and Amazon. With Amazon, if you click on one of our links and then buy something else – even unrelated stuff like clothes, electronics and groceries – we get credit and it would be hugely appreciated. Doing something like the above will help us fund continued development of the blog.