I managed to get hold of a fully functional Zeiss Ikon Ikomat 520/2 for £20 a while ago, slightly out of budget but came from a reputable and experienced ebay camera seller so I don't consider it to have been underpriced.
Put it on a tripod, use another camera as a rangefinder to get the focus spot on (and as a light meter), and it'll do amazing things.
Not sure about elsewhere in the world but charity shops in the UK are getting cunning. The staff are now under instructions to check any donations against web prices and sticker them accordingly.
Problem is, they're not a camera shop and do not have the same test or repair capabilities. They see a lens priced at £60 on ebay and don't understand that it's a chancer hoping someone will pay far more than the lens is actually worth. They often can't check for fungus or other faults, so they end up asking more than an item is worth and end up with an angry buyer who's been sold an item with mushrooms growing inside it.
Last edited by PentaxBronica; 12-22-2012 at 12:12 PM. Click to view previous post history.