auction sites has plenty of 3070s, 3060ti, fewer 3080s, and some 3090s. Some vendors also bring in the 3070s at least from time to time, I'd say at least once a day, you got to keep looking. OC has a staple 3090 stock. You'd pay ~ £720 for a good 3070 ( 3 fans, OC ) on both ebay and other vendors. I managed to buy 3 x 3070s (returned one, expecting the other still), missed on another 2 or 3 3070s as they "disappeared" from my basket as I was trying to pay. Almost bought off a couple on ebay but shops are same price or lower and you buy new, so why pay inflated ebay prices. Currently very happy with the EVGA 3070 XC3 Ultra, it says "OC 1770MHz" on specs, but it always runs at 1950MHz-2050MHz on my most demanding game, not sure why. It can run WoW at ~40% utilisation, Subnautica at 75%-95%, all at 4K. I believe it would struggle at 4K @ 120Hz, maybe the 3080...