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I'm looking for a retro road bike and found a Gudereit T30 with a steel frame, 12 gears, and Mavic rims.
How can I compare this bike to more common bikes to figure out its value?
Comparing the shifters and gears seems easy (DuraAce-Ultegra-105), but how do I compare the steel frame and wheels?
Some pictures:
A reasonable estimate can be found using a site like Bicycle Blue Book. This site is a database of used bike sale transactions going back for almost a decade, and has a number of pretty obscure manufacturers listed. You can even add upgrades you have made from the stock and get an estimate of how that changes the value, though it doesn't account for things like racks, fenders and lighting systems you would add to a bike to make it a competent commuter bike.
I've sold 4 bikes within the last 6 months, and all 4 sold within a reasonable range of what was listed on that site.
The bicycle blue book does not include a Gudereit, which is a German brand. It seems to miss information about a lot of European brands and models yet.
Sometimes a sticker on the frame indicates the build quality. There is a sticker just below the saddle and on diagonal tube almost entirely at the front if I see it correctly. If one of those says something about the type of steel used, this is a great indicator for the build quality.
Besides this, you can only compare it to similar brands with similar parts in your region.
