I don't have any mind blowing tales but here is a cool one from the early 70's. In a pawn shop in the Southwest, hanging on the wall behind the counter, I spy a very old looking Martin type acoustic(0M?) with incredibly aged patina and I know it is something. It has no strings and is somewhat beat and they are asking 10 dollars. I offer five pretending it is a POS not wanting to tip them off and they take it. I bring it back home(east) and bring it to my guy who runs a local guitar store and he was obsessed with very old guitars even then, Martin and Gibson mostly. It was a 1908 Washburn and he restored it very nicely and it went for a guitar(Martin D28 style) that he made me. That guitar was a disaster(his third guitar) so I ended up with a 1936 J-35 in mint condition. And in conclusion, like an idiot sold it for maybe $750 a year later. That was the most valuable guitar I have ever owned based on current prices.