A related story to this I thought I would share.
A number of years back when I started buying stamps off
ebay, there was a "lot" of mint stamps up for sale. Since I was just beginning my collection, I often looked for lots that I could buy for a good price.
Anyway, the seller had scanned pretty well every stamp in this lot (which is somewhat unusual, but OK). Going through the scans, I noted two Seaway inverts. Yes, two, mixed in with this somewhat ordinary lot. Each was in it's own card (as were many other ordinary stamps).
Now, OK, I think to myself, it's possible, but really? After all these years, no one noticed two copies of Canada's most famous stamp variety?
Well, I thought, I'll keep an eye on it, and bid based on the normal value (assuming these are fakes - not hard to create really, glue an inverted center on).
Well, the price stayed around the same for a typical lot, so I am thinking, wouldn't it be cool to get this and find out they were genuine. Maybe no one else bothered to go through the pictures. The inverts were mixed in and were not overtly obvious.
So I wait and guess what, the lot price jumps from about $100 to $5000 in the last few seconds. Obviously at least two others saw them and bid hoping for a bonanza.
Were they real? I truly doubt it, but I will never know for sure. The seller either lost out, or was a really good scam artist. In those days, getting your money back was not so easy and I wouldn't have risked it. Besides the seller never said there were inverts included, so the buyer would have some trouble in a court case if it went that far.