Listed at multiple AHs?

[Snapolit1]

I was following an auction last night on Pristine Auctions for a signed Gehrig Ruth ball. Signatures were very faint but readable. I thought maybe it would be the only signed Gehrig Ruth ball I would ever possible own so watched it. Didn’t get it.

What was very odd was I googled the ball and it seems to simultaneously be for sale at 7 or 8 other places. I didn’t verify but all seemed to be current listings. Was the same ball with the same PSA and JSA certs.

Do auction houses just try to sell stuff that’s out there in the market even if they don’t possess it? Maybe like some clearing house where you post something and a desired price and anyone who wants to try to sell it can. I did notice on Pristine last time I looked “reserve not met”. Odd.

Maybe this is a common practice and I never realized it.