i sell my non workers yellow or white and hq when i have spares for $95 and this has been my price for well over 10 years..
working clocks i have never sold because i can get $200 more for the dash with them in it...so you would have to say that a working clock is worth 200 or more...

if you take a non working clock to the instrument repairers they charge between $75 and $165 depending on whats wrong with it and what area you may be in..(prices quoted are customer feedback)
so if you dont have a clock to start with and you buy one thats not working and get it repaired then a working clock is worth?