I prefer to open them because I buy them in order to be able to actually use the stuff in it. Otherwise I would just buy the empty box on eBay and put it on display
Though I am planning on purchasing three copies of the Skyrim CE if it comes at a reasonable price.
One to open and play with,
one to keep sealed for years and years until it's market value has hit the roof,
and one to keep sealed on display forever and ever and ever and ever...