Keep trying NewEgg on shuffle. That's how I got my 3080 Ti. However, not unlike BB, the higher end GPUs on NewEgg's shuffle are a package deal with an M.2 SSD or a power supply. Mine was bundled with an EVGA 850W G+ power supply which is far from high end. I actually sold it to a co-worker's son at a discount for his first build and took put that money into a Superflower 850W Titanium (not going to risk that GPU on a non-premium PSU!).
Regarding Microcenter, the last I tried them, and this was late last summer when I was building my new rig, their shuffle program did not have any price gouging. Maybe that's changed now, but I do know one thing: the GPU market is getting worse, not better. My EVGA card is up $80 on NewEgg from $1.399.99 to $1,479.99, and that's just at retail price. I actually got another GPU from NewEgg on their shuffle, an ASUS Strix RTX 3070 for $799.99 by itself, for my nephew's gaming build for his birthday. So persistence does pay off if you keep plugging away. It took many weeks, nearly two months, to eventually "win" both cards to purchase each time. You will have a better chance of winning with a bundle combo on a GPU. You can always sell what you don't need. With Best Buy's BS upsell $200 "service" bundle, you cannot sell it! And who the hell needs 7x24 tech support from some contracted 3rd party by Best Buy for a GPU anyway?
Edited reason: fingers type faster than brain wants