I never have but have been curious like you. I would stay away from those roll lots with the "Indians on both ends" or "mercury dimes on the ends". Those are an obvious scam. But if you could find some unsearched 5000-ct bags you might have some luck. I think most of those have been searched by someone along the line and are probably mostly 40s & 50s common dates. I was allowed to search through a big bin of wheats at a pawn shop once. The guy said I could have as many as I wanted for 5c each. I spent about 2 hours going through them and pulled a ton of better dates and mint marked coins from the teens, 20s, and 30s. Among them were about 7-8 09 vdb, 2 22d, and a bunch of 21/23/24/26 s-mints. I think I got $200+ worth of wheats for like $7-8 bucks.