From reading the links, the seller could be stealing orders that people have ordered from newegg and he is selling big piles of them at cheap rates to get cash and get rid of the items quickly.
The items come shipped directly from Newegg, 2nd day air, addressed to the correct recipient, but with a "bill to"" name and address that is not the recipient. So, to simplify, for example...
I buy a widget on eBay. It arrives a week later, but it comes shipped from Newegg and the packing slip says it was billed to some guy named Bob in Omaha. Not only that, but when I contact Newegg to ask about warranty, they state the item sales order was $175, but......
I only paid the eBay seller $130. Free shipping.
You get it now?