My greatest value came in the form of a Yamaha G85A which I found at a farm auction some years ago. After a bit of a bidding war
it cost me the grand sum of $42. I still use it as a beater for playing at picnics or where ever and if it gets a scratch then 'ah well, too bad.' It plays and sounds fine too.
Maybe one day I'll get a high value guitar for the same price but this is certainly worth a lot more than I paid for it, so I'm a happy bunny.
Getting better bit by bit, day by day.