$200 is not really cheap. For $235 you could buy the new r9 280. Although the 280x is slightly faster. But not big jump. Just marginal.
Am actually facing the same situation.
R9 280X used at $250.
R9 280 brand new at $265 (lazada)
Not sure which to approach.
From the benchmarks I've read, it is surely better to go for a used 280X over a new 280 if you can get a good deal.
Found a used Gigabyte R9 280X at 230. (Warranty left 1yr 11months)
Brand new Sapphire R9 280 Dual X at $265 (after lazada 10%, warranty 2 years).
Which to hoot? 280x? Do advise gurus.