I think I'm going to purchase several used RX 480 with 8GB.
But this time the mining will be in a slightly different tactic.
Instead of mining ETH I want to build a new rig and try to mine solo less familiar coins.
Its a good approach but however you will not make any more money that way. You will only save maybe 1% because you avoid pool fees, however you have variance to deal with. And if you mine a coin like ETC which still has a high difficulty it can still take a long time to find a block.
Most POW coins these days generally are almost never listed on a large exchange like Binanace. Most of the new coins and projects are all ICOs and they use a ERC20 token. Gone are the days of instamining new coins and then selling for top dollar as soon as it hits an exchange.