I don't understand this could you explain?
He's saying people let others use their eBay accounts through RDC to game the system.
Also it's an auction site. People want to raise the price by bidding on their own items
So let's we have fraudseller_1 that sell something like iPhone. Here comes honestbuyer_1 that bid for this item with $50. Seller sees offer, but want to rise it.
Since seller can't use his own IP he is using some remote desktop to login somewhere else as fraudbuyer_1 (different account!) and bid $100. Then he wait honestbuyer_1 to bid again. If this happens then two - fraudbuyer_1 and honestbuyer_1 can "race" (note the quotes!) for this item.
Of course this is simplified scenario because can be involved pack of fraud buyers to fool buyers.
I know some person IRL that was involved 10 years ago in such activities. So his friend sells vacation homes and buyers from UK bidding for them. But if seller doesn't like bids he call to that person to make bid from his own account. And of course to rise price with least $1000.
But... this can't be track using eBay since it's via phone call and no remote sessions. Today sellers using virtual desktops (RDP, VNC, TeamViewer or other) to do this.
Seller B is having a hard time making sales. She thinks he needs better ratings. So she logs into the site using a remote client and 'buys' 10 of her items on different accounts and leaves 10 glowing reviews.
Ebay is scanning ports to detect the tools used to do this.
So why don't you set the starting price at $10? Does ebay not let you set the base price?
It's the same thing with the penny auction sites like DealDash which is part of their terribleness.