I would have to ask him that question. I'm not even sure what it means. I'm going to see if I can get more information from him later today and why he is settled on this particular GPU.
It looks as though the card he wants is $550.
I saw the price on your newegg link, but I thought I had spotted an OOS price on another site for ~$400 (guessing it was a completely different 3070 with a very outdated or ComeOn price)
I see on asus.com that there have five models of the 3070, and they do list the TUF as $559
EDIT: it's a Hail, Mary, but set Notify Me alerts on several sites, including ebay; you never know what might pop up . I have a few of those alerts pay off a week or two ago when I was looking for a LP GTX 1650 (admittedly not as in demand as the 3070): I got alerts from Amazon, Walmart, Newegg, and Newegg on Ebay. Amazon and Walmart went OOS in short order, but Newegg and Newegg on Ebay lasted a while. But then again, I was looking for just any LP 1650 at MSRP.