So, I've had great luck with reviewing old maps and comparing them to newer for older towns and on outskirts of populated areas and looking for "abandoned" or "moved" roads. I hit the jackpot last year and discovered an entire road, hidden away in the woods on the other side of a creek, where...
I'd love to keep my collection intact & together of course and given to a museum, but I'm going to make sure my final arrangements outlines what I'd like done with my hoard, regardless.
*Rare ones to collectors & venues where they can be shared/enjoyed (specified)
*Sell off privately...