It's probably fine, but there's only one way to find out, and that's by testing it. You should also be able to return it to the seller on Amazon if you're not comfortable testing it, especially if they are a "preferred seller". Another option is to just throw a heat-sink on there with no paste and see if it boots. If it works, pull the heat sink off and throw some paste on there and call it a day. I've seen GamersNexus do this, though he advised caution. The IHS might get a little scratched but it should honestly be fine.