I think the reason why suspicions might be raised is because there are various seed sellers on eBay, located in temperate areas of the US, that have an impossibly large selection of uncommon tropical seeds. I found one the other day, in Indiana, with some hard-to-find Garcinia seeds for sale, along with about 400 other types of plant seeds. I wonder what type of seeds I would get and where they would come from if I ordered from that seller.
I have looked at (and bid on) your listings, and I do not think you fall into that category at all. What you are listing and how much you are listing do not fit the profile of a scam seller. I could be wrong, and you could be listing nothing but Sabara jaboticabas and Surinam Cherries, but I do not think so. If (and when) I win some of your seed auctions, I will see what starts growing. But, I have seen nothing in your auctions that makes me wary of bidding on your plants and seeds.
Good luck with your auctions. It is good to see another person growing these interesting Eugenias, Plinias, etc. in a temperate location.