I think you'll get between .3 and .7 btc per month, let's say an average of .5 btc which equals 68.5usd. Power draw should lower your profits a bit, but not too much.
If you mine say worldcoins and trade for bitcoin to then trade for cash immediately you'll make 1.97usd per day, and 1.13usd after power costs. If you mine more profitable coins instead of one stable one, you can make up to 2.7usd after power costs.
Say the card costs 550usd, if you get the non x 290 and it hashes at 1000kh/s whilst drawing 250w...you'd recover the investment in 9 months. Assuming you pay 0.1usd kwh.
Thing is, we still buy this expensive hardware, right? Why not make some extra money with it, and maybe even recover the cost?