They will be offering this kind of thing, yes, but it won't be this stuff. It will be merchandise with a certificate of authenticity along with a full provenance (the history of the piece, who's owned it when) and a guarantee that should this piece be questioned, the seller will back it up, and if he is proven wrong will buy it back at the selling price. (That's the reasons the prices will be sky-high.)

Most of the [i:62a2528548]Titanic[/i:62a2528548] artifacts offered on eBay are questionable, to be charitable about it. Or it's collectibles, which are nice but not very exclusive. There is no sort of authentication system used - it's let the buyer beware. Usually, you get a letter from the person saying yes this is what I say it is - which is worth the paper it's written on. One of the reasons you want to go to a dealer is they will stand by their stuff, and if it turns out to be fake, will buy it back at the purchase price.

Most serious [i:62a2528548]Titanic[/i:62a2528548] buffs use the stuff on eBay to laugh about. Period.