Picked up a Canon FTb at the flea market today for $20. Now, I don't typically shoot Canon film SLRs, so I would have normally passed this one by. What made me get it was the FD 50mm/3.5 macro lens that was attached to it. That alone is worth more than $20!
I founded it on my Olympus OM-D E-M10 and should a few frames. This one's definitely a keeper!

Dandelion Flower Macro by Nathan Adams, on Flickr

Dandelion Puff Ball Macro by Nathan Adams, on Flickr