| USED - SpaceCat 51mm f/4.9 APO | cloudbreakoptics.com | 400 USD | 748 USD | −46.5% |
| Used ZenithStar 81 Doublet APO wth 0.8x FFR | milehighastro.com | 700 USD | 1,286 USD | −45.6% |
| Used William Optics Durabright Dielectric 2" Diagonal | milehighastro.com | 125 USD | 219 USD | −42.9% |
| Used ZenithStar 61 f/5.9 Doublet APO (Space Grey) | milehighastro.com | 350 USD | 599 USD | −41.6% |
| Like New In Box William Optics 48mm T-mount for Nikon Z Mirrorless | milehighastro.com | 40 USD | 68 USD | −41.2% |
| Used William Optics UniGuide Slide-base 50mm Guide Scope | milehighastro.com | 100 USD | 163 USD | −38.7% |
| Like New William Optics Innovative DSD 210 Dovetail Plate (gray) | milehighastro.com | 30 USD | 48 USD | −37.5% |
| Used WO MiniCat 51 WIFD f/3.5 + Uniguide 32 guidescope | milehighastro.com | 650 USD | 1,020 USD | −36.3% |
| Used William Optics 1.25" Dura Bright Dielectric Diagonal | milehighastro.com | 80 USD | 110 USD | −27.3% |
| Open Box Fluorostar 132 f/7 APO Space Grey | milehighastro.com | 3599 USD | 4,818 USD | −25.3% |
| William Optics SWAN 40mm Eyepiece - 2" Made in USA! (Pre-owned) | khanscope.com | 140 CAD | 187 CAD | −25.1% |
| William Optics Red Cat71 - RedCat 71 mm f/4.9 Refractor - T-C-71RD | khanscope.com | 1845 CAD | 2,445 CAD | −24.5% |
| Brand New In Box William Optics 1.25" Dura Bright Dielectric Diagonal | milehighastro.com | 90 USD | 110 USD | −18.2% |
| OPEN BOX - RED - William Optics Innovative DualSide Dovetail 210 Plate - M-PRC210 | telescopescanada.ca | 56 CAD | 66 CAD | −15.2% |
| Pier Mount 90 for AM7/AM5N | milehighastro.com | 949 USD | 1,099 USD | −13.6% |
| Pleiades 111mm WIFD f/4.8 APO | milehighastro.com | 3698 USD | 4,198 USD | −11.9% |
| ZWO EAF Mount Bracket with Clutch | milehighastro.com | 179 USD | 199 USD | −10.1% |
| Pleiades 68mm WIFD f/3.8 APO | milehighastro.com | 1998 USD | 2,198 USD | −9.1% |
| William Optics Fluorostar 120 APO Triplet Refractor OTA (RED) | astroanarchy.com.au | 4499 AUD | 4,899 AUD | −8.2% |
| William Optics Gran Turismo 81 APO w/ Internal Focus Design, Field Flattener & UniGuide | skydeep.com.pk | 638685 PKR | — | — |
| William Optics RedCat 71 APO Telescope - Red | skydeep.com.pk | 483930 PKR | — | — |
| William Optics Gran Turismo 71 APO Refractor - Red | skydeep.com.pk | 341430 PKR | — | — |
| William Optics RedCat 51 Gen 3 APO f/4.9 Refracting Telescope with WIFD | skydeep.com.pk | 253080 PKR | — | — |
| William Optics ZenithStar 61II Doublet Refracting Telescope - Red | skydeep.com.pk | 170715 PKR | — | — |
| WO Ritchey–Chrétien Telescope | williamoptics.com | 99999 USD | — | — |
| William Optics Pleiades 181 Astrograph F/5.5 7-element with 3 ED glasses | davidastro.com | 27597 CAD | — | — |
| William Optics Pleiades 181 Astrograph | ontariotelescope.com | 27597.0 CAD | — | — |
| William Optics Apochromatischer Refraktor Pleiades 181 AP 181/998 Astrograph OTA | mjkzz.de | 20990 EUR | — | — |
| Pleiades 181 | cloudbreakoptics.com | 19998 USD | — | — |
| Pleiades 181 | milehighastro.com | 19998 USD | — | — |
| Pleiades 181 | williamoptics.com | 18998 USD | — | — |
| William Optics Fluorostar 156 APO Refractor | ontariotelescope.com | 12417.0 CAD | — | — |
| Fluorostar 156 f/7.8 APO | milehighastro.com | 8998 USD | — | — |
| [Bundle] Ultra-Cat 131 & ZWO AM7 Full Package | williamoptics.com | 8998 USD | — | — |
| William Optics FLT 156mm f/7.8 - Feather Touch 3.5-Inch - Red | optcorp.com | 7898 USD | — | — |
| William Optics Ultra-Cat 131 Astrograph | ontariotelescope.com | 7559.99 CAD | — | — |
| William Optics Ultra-Cat 131 f/4.9 Petzval Astrograph | davidastro.com | 7449 CAD | — | — |
| William Optics Ultra-Cat 131 (T-C-131BR) | astronomyplus.com | 7449 CAD | — | — |
| William Optics FLT 156mm f/7.8 - WO Rack and Pinion 3.7-Inch - Red | optcorp.com | 7398 USD | — | — |
| William Optics FLT 156mm f/7.8 - WO Rack and Pinion 3.7-Inch - Gold | optcorp.com | 7398 USD | — | — |