Need advice on a social dilemma?

My husband’s friend and co-worker brought in a bunch of stuff and gave it to him saying that he was no longer going to be grilling out anymore, and he thought we might like to have it. (He became a widower last year.)

But all of the stuff is brand new. It was still in the original packaging and a couple of pieces even had tags on it.

We are puzzled. Do we thank him? Do we ask him about his obvious white lie (that he had used the stuff)? How should we respond? If we say anything, what should we say?