2001 Heritage Chrome is a good pick. They already had a big surge a few years ago and came back down but at a higher level than previously, it seems. I doubt they would reach a 90s parallel price, where a common card is $30 or so, but even at 552 copies it is tough to find particular players.
Base Topps parallels are also interesting because some of them are SO tough, like the 2012 Gold Rush promos or factory set packs. You literally might see one card once and never again.
Base Topps parallels are also interesting because some of them are SO tough, like the 2012 Gold Rush promos or factory set packs. You literally might see one card once and never again.