Collecting is one thing, I'm all for people collecting what they like. However that's different than buying things and putting them away thinking they will be more valuable in the future. In that regard I don't see Tupperware ever rising in value over time beyond what you can buy the current version for. There may be a few outliers, but I can't think of any offhand. So I wouldn't deprive yourself the joy of shooting that rare Glock 19 with the $100 bill cerakote you've been holding onto.