Here's what I have so far, and all it adds up to is

In this thread, the OP says he got a fake coin from
marketables. It was replaced with what OP thinks was
another fake, which
marketables has offered to make good.
Some of us think the replacement is good, some not, I don't think any experts have weighed in, and don't consider myself an expert, either.
When I searched for "double sharp", an earlier thread,
https://goccf.com/t/83171popped up.
In that thread, I opined that
marketables could be selling fakes. Others commented that
marketables was OK, but that Chinese fake sellers had copied their pix.
We all know that
ebay FB is meaningless, for a lot of reasons. One of my favorites is "first stone", where people who
should leave negs don't do it for a 100% seller. nicmac(#) got positive FB for stuff that wouldn't even
exist for two years or longer.
Years ago, a study showed that only 20% or so will return an item, no matter how grossly misrepresented. Bad sellers know that they could sell 100% counterfoots, and get 20% back. Apologize profusely and refund, and it's still unlikely you'll get kicked off
ebay (or CW, or NN).
So what's the situation here? I have no reason to disbelieve the OP, who says they've gotten two fakes from the same seller. Then again, 64 halves should check OK, and they didn't.
OTOH, the seller shows multiple red flags.
They include their email in listings, which either isn't allowed, or won't be soon.
Many main pix are rotated, all exactly the same amount. Perhaps nothing, or maybe just enough to throw off people checking for diagnostics.
double sharp. As I've said,

is that about?
A big one: Often no pix of coin reverses, complaints about unseen damage (on back)
Note his only "store" copy, especially the red ones:
Quote:Silver, Gold,
Morgan dollar,
Peace dollar, 1879-CC, 1880-CC,
1881-CC, 1885-CC, 1889-CC, 1893-S, 1893-CC,
1894-P, 1903-O, 1921, 1928-P, 1934-S Lincoln, Indian, Mercury, Walking Liberty, Halves, Bust, Seated, Type Pieces, Cents, Nickels, Dimes, Quarters, Dollars, Bullion, Commemorative, Eagles
These are all very hard to find, and yet it seems he always has them, and at really cheap prices. Does anyone here know of a ready supplier of these scarce dates in high circ grades? I sure don't.