I actually bought some un-opened packs.
Bought some 86-87 Fleer basketball & some 79 Hockey
(those with possible Jordan RC and Gretsky RC)...sent them in to grade and came back as tampered....so i opened them up.
2nd time..i think i bought like a 5cent (1 card) unopened wax....waited and eventually opened it. Still got wrapper/card
3rd time... i bought a whole un-opened case of Topps Basketball --81-82...well opened all the packs..sent in the 3 larry birds to SGC for grade and went well.
4th time... i bought a grade 9.5 wax pack 1984 football
5th time.. i bought a rack pack 86 football.. got 3 Jerry Rice Rc and a Elway.
6th time..i got suckered into a 53 xmas baseball rack pack..still were nice cards and sent for grading and got good results. Sometimes i put them on ebay.