It's not a good idea selling your 3070ti and 3080 ti right now
1. You will sell lower.
2. LHR graphic cards are already unlocked.
3. A2000 is not cheaper, you will need to add more money from your pocket with the RTX 30s money.
4. 3070ti do 80MH and 3080 ti do more, no point in selling
This your idea only make sense if we are in a bull market .
This idea doesn't make sense in any market. In a bull market, you will sell graphics cards for a high price and buy other GPUs for a high price. In a bear market, you will sell cheap graphics cards and buy new ones at a higher price.It's a good option to sell the GPU at the end of a bull market and buy in a bear market, but we don't know when that will be.