It's hard to be sure based on these photos, but I am suspicious about this card. As already stated, it does indeed look like there's glue at the top of the card above the bubble, plus there's some discoloration / glue / dirt beneath it at the top of the bubble too. I know the seller said the bubble was lifting there, so it COULD be caused by that, but I'd still be cautious. Plus, there's a lot of white specks of missing litho beneath the seal, which could be caused by the card slipping slightly when the bubble was heat sealed (and this could also explain the excess glue at the top of the card possibly), however it could also be where the bubble was imperfectly glued back on when being resealed. If it is a reseal, it's quite a well done one, but then again, if it is a reseal, it's not worth MOC money. Perhaps you could ask the seller for some more, larger and clearer photos to help you decide?