i voted keep it sealed, but it is up to what you plan for "long term" with the cards.
lemme tell you a story.. (LOL)
i had 3 1991 donruss baseball sealed factory sets in 91. they were over $100 then at woolworths i think (woolworths!!).. the insert studio preview cards were making their way up on the beckett price guide for a time. i poped and opened them.. got the "good ones" too.. i held on to them but never sold.. well.. you can see what the price on these sets and inserts are now.. crap! even sealed.. so now i wish i would have left them sealed at least to have "fresh cards", not slightly yellowing edges from 20+ years of storage..
if you want to make $$, open and sell.. if you truely want to collect them "forever" leave them sealed and get ready for a massive price hit after time.. good luck with your decision.
lemme tell you a story.. (LOL)
i had 3 1991 donruss baseball sealed factory sets in 91. they were over $100 then at woolworths i think (woolworths!!).. the insert studio preview cards were making their way up on the beckett price guide for a time. i poped and opened them.. got the "good ones" too.. i held on to them but never sold.. well.. you can see what the price on these sets and inserts are now.. crap! even sealed.. so now i wish i would have left them sealed at least to have "fresh cards", not slightly yellowing edges from 20+ years of storage..
if you want to make $$, open and sell.. if you truely want to collect them "forever" leave them sealed and get ready for a massive price hit after time.. good luck with your decision.
I've got Pro Set for Trade. All years, All sports, including Non-Sport and Errors and Variations. I collect All Pro Set and All Baseball from 1980 - 1991.