BestBuy has the Dell S2719DGF 27" 1440p 144Hz (155Hz w/ Factory Overclock) LED QHD FreeSync Monitor on sale for $279.99.
If you prefer eBay, BestBuy’s eBay store also has the same monitor for $279.99.
This is basically the free sync version of the well regarded that was Front Page.
Here are some reviews on the monitor:
Tom’s Hardware
IGN
The monitor uses a TN panel, but the image quality is very nice for the price.
I just bought this from Amazon maybe less than two weeks ago for $349.99 and I thought that was a deal. Anyway, this might make a nice monitor for anyway running an AMD GPU.