General Discussion

After you bought your item on ebay, that seller just ordered it from Walmart and had it shipped directly to you.

At a minimum, it's "retail arbitrage" which is a violation of ebay policy. At worst, it could be "triangulation fraud" involving stolen credit cards and possibly putting you at risk.

See:
https://community.ebay.com/t5/Buying/I-ordered-from-eBay-and-Walmart-delivered-the-item/td-p/33819791
and
https://community.ebay.com/t5/Buying/Walmart-delivered-Ebay-order-Possible-Triangulation-fraud/td-p/33617488

I know all this because my husband had an ebay purchase arrive from Walmart last month. He'd seen that the item was cheapest at Walmart but we haven't given them a penny in decades. He was happy to find it on ebay at an only slightly higher price. Then we saw the return address.