I have some proof sets that I am listing on ebay. From jiggling around over the years the coins have turned around so that the obverse side has 6 heads all at different angles (some upside down). I think it might turn off some buyers. Is it possible to discretely open the case and use a q-tip to straighten them up and reseal the set? If it is possible, it is uncool to mess with it?
it will probably be obvious they were opened, and there is a small risk of damaging the coins too. Coins rotate even in graded slabs. I think a real collector would be more "turned off" by opening than rotating.
definately don't open them. i'd buy ones that are rotated. like fuzzy stated, coins spin sometimes. tampering with it would turn away buyers. and if you don't mention that you opened it then buyers will not be happy.
Definitely dont open the set if you want to sell it complete,however depending on the year/type a lot of purchasers want to buy the coins individually and will quite often pay a premium for separated proof coins
Are these US Mint issued proof sets and if so, how old are they?
The US Mint proof sets made in the last ten years or so can be easily opened and closed without detection. The sets older than that can be carefully opened, but they will not close exactly the same as they were.
It may be best to leave them alone, unless you want to take Graeme's advice to sell the coins individually.
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