Sorry but unless it's 50% off I don't bother. Too much to go wrong here. Let me share the scary story.

There are unscrupulous folk that need a motherboard because their laptop had blown parts. They'll buy the same laptop, make the swap and return it. It could even be a rare memory socket failure so they return the unit and the next buyer gets to find the issue and deal with it.

I am not a fan of open box items unless it has a steep discount. And that includes any claim the store was the one that opened it.
Bob