We found a few boxes of old Topps sets that were sold at a relative's store back in the day. They range from 1988 to 91 and have been unopened and are in the original box. A quick Google search shows some potential gems in these boxes (the George HW Bush card, a Griffey rookie, but not the Upper Deck one and the Frank Thomas rookie with possible errors), but not much else. Is it better to keep them as is, break open and see what's in there or sell as a whole? Trying to see which route provides the best value play.

What is everyone's thoughts on crossover grading? Just got back a Max Scherzer rookie card from PSA that's a 9 after sending a bunch of my better cards to SGC at The National last year when they had a special promotion. Thought it made sense to see what the grades come back as at a discount before seeing if it was worth sending to PSA for a more legit evaluation. Did I go about it the right way or should I have just sent everything to PSA first?