Canon EF 500mm f/4 L IS USM

The estimate blends recent sales with the median asking price. Each sale counts less the older it is, and the more recent sales there are, the more they carry: with none it is the asking price, with 5 recent ones half and half. So it moves gradually, never in a jump. Figures resting on fewer than that are marked low confidence. In an asking median no shop counts for more than a third (or an equal share, with fewer shops), so one shop’s price list does not decide it. Parts-only and brand-new units are left out.

Kamerastore Certified is Kamerastore’s own published average for units it grades Certified (tested and working), read 2026-10-13. It is their figure, not Kamarvo’s, and is not part of the estimate.

Prices quoted in CZK, EUR, PLN are converted to EUR before the median.

Shops: Cyfrowe, Kameraliike, Kamerastore, Megapixel, Rajala Camera. 7 pages from shop archives.

Exchange rates: European Central Bank, 2026-10-12.

These shops buy used cameras and lenses, or take them in part exchange.

• MPB EU
• Kamerastore FI
• Rajala Camera FI
• Kameraliike FI
• Harrison Cameras GB
• Camera West US
• Pro Photo Supply US

A shop buying it pays less than it resells for: the estimate is what it sells for.