Absolutely not. Since you already have a 780, do not buy any GPU right now unless it's AMD series due to Ethereum mining paying for the entire upgrade before any next gen GPUs launch. 980 for $380 isn't a good deal at all. If you are bored, you can sell the 780 for $200, grab an R9 390 for
$295, sell Hitman for $30, and start mining Ethereum. Then in 2-3 months, the 390 is paid for itself fully. That means once you sell the R9 390 for $200, you'll have $200 + $200-250+ generated from Ethereum. That would get you a $400-450 next gen card. 980's performance in modern titles is more in-line with R9 390, which isn't a good sign at all. Otherwise, I advise for you to hold on tight and upgrade over the next 6 months. Once Polaris 10 and GP104 drop, new 980s will go on a fire sale. Last generation, the week 970/980 launched, 780Ti plummeted from $650 to $375-400 and even at those prices it was a worse buy than a $330 970. I wouldn't be surprised that once GP104 1070 launches, we will see clearance GTX980
Ti for $380-400. So don't worry, soon you'll get a way better deal than a refurbished 980 for $380.