A foreign collector asked me to bid on the 9mm Mauser cartridge listed here on Gunbroker:
It was listed as collectible ammo, with a starting bid of $4, about twice what one of these cartridges should sell for. I went ahead and placed the bid, and sent an e-mail to the seller to determine what the headstamp was for the foreign collector. The sellers response was that the headstamp was WINCHESTER 9MM MAG - certainly not a 9mm Mauser headstamp that I am familiar with. I sent another e-mail expressing my concern that he might have made an error in listing it, to which he responded “this is a custom made 9mm mauser using a parent case of the 9mm win mag”. That, of course, explained the high cost, considering that it was custom made. It is interesting to note that his lengthy description was ‘9mm mauser’, and he included a blurry side view photo of the cartridge. He did suggest that in the future, I ask a lot of questions before bidding, certainly sage advice when dealing with this character. I should have been forewarned by his choice of a seller name on Gunbroker. He agreed to stop the auction, for which I get to pay him $1, and then he turned around and immediately relisted the cartridge with the same short description as before, with no information about the cartridge having been made from a 9mm magnum case.
I would suggest that anyone considering bidding on one of this individual’s auctions be very careful; you’ll certainly want to pepper him with plenty of questions before making a bid. He does have low postage, however - $3 on this cartridge, which suggests he is using the US Postal Service for shipping live ammo.