I bid on a couple 1970 mint sets so I could have a 70 D Kennedy and I won both of them, surprisingly. I'm trying to decide if I should cut them open and put the coins in 2X2's or leave them in the mint cello.
Just make sure to check those 1970 S Lincoln cents for the Small Date and RPM... I voted "Depends on the coins" because, well, technically I only buy mint sets if they have varieties in them. The only ones I don't do that for are ones that I pick up so ridiculously cheap that I re-sell them for greysheet bid.
So maybe just cut out the kennedy and varieties? That makes sense. I see a lot of individual coins still in the cello. The plastic on the kennedy has a couple pinholes in it so I'm gonna take it out.
Cut them all out and spend any unattractive and valueless coins. Stabilize the others by soaking in a mixture of acetone and 91% isopropyl alcohol and then put into holders. Most of these older mint sets are not stable and the coins need protection.