Sealed 1958 Sleeping Beauty Record and a Picture Book

Yesterday while out grocery shopping, I decided to check out the thrift shop next store, and came home with 7 records, including a sealed copy of Disneyland Records 3911, Walt Disney's Story of Sleeping Beauty, told and sung by Mary Martin. Anytime I find a sealed record in a thrift shop, I have to wonder, is this an actual still sealed, never played copy, or has someone resealed it at some point to make it seem more valuable. If that later is true, then how has it come to be sold for next to nothing in a thrift shop? I would love to open it and find that inside is a scratched up copy of a Village People album or some other album that someone has stuck in side and sealed up. But if it turned out that the album inside was truly the correct album and it mint condition, I would have just busted open a sealed album from 1958. So, in this case I guess I will have to just go with the idea that I have indeed found a sealed copy that is in the exact condition it would have been on the music store shelves back in 1958. What do you think? Have you found sealed albums in thrift shops etc? have you ever opened one that was sealed just for the fun of it? Have you ever sealed one yourself just because you could?