Yes, I have the same experience with this guy buying an Avalon 4.1 in the exaclty same listing. First of all, in my case it ended with a refund, so maybe this guy is not a scammer, he is just selling whitout having the units in hand.
3 days after the purchase, he added a tracking number to eBAy. 2 days after we wrote me that for quality check he was going to test the unit for 15 days, and that what he sent me already was a "gift". I answered that as he was a reseller, he hasn't to test anything. Next he wrote that he was imprecise, that it was the manufacturer who was testing. I replied that in that case he was selling something he didn't own in hand, thus he was violating the terms of eBay. Finally he acceded to a full refund.
He has a terrible english and is slow answering, but I hope if you contact him he will accept a refund. Of course, everybody have to be warned with this guy, I don't recommend him.
If you need it to take actions against him on eBay, please PM me, as maybe you can explain them that more people has bad experience with him
EDIT--> Another warn to the people: he is a jewelry seller. In his selling history he has some scrypt miners. However, all that listings were ended by himself in advance, so they are not actual sellings. Everything around him is strange. But as I told, in my case he fully refunded my money. Good luck Philima!!!
He did contact me I can wait a bit we agreed to see what is up after 3 days. I put in a refund claim so on Weds I will contact ebay if he has not refunded me or shipped the gear.
To anyone looking at the auctions for the avalon 4.1 be very careful.