Ancient old 7850 2gb gets 65Sol/s
Considering the price of 7850 used now which is about 60 USD as we speak it still maybe a good option (of course if you have cheap electricity). I would be personally happy with 65 Sol/s from the GPU and 10 Sol/S from my CPU.
My PC stays on at least 12 hours a day or even more for other duties so if I add mining what can be the problem? I pay that pay for electricity. I am thinking of buying a RX 460 as a card for my new PC, should perform better than 7850 and the power consumption is 2.5 times lower. It looks like this Zcash is quite profitable mining with GPU-s.
How many Sol/s are 460s putting out?