Of the adapters that I have used for AC, only one is around $20 that I would recommend and that is the
TP-Link USB model. BUT it does not have Windows 10 drivers, so if you use or plan to move to Windows 10 then don't consider it.
If you can increase your budget,
HERE is a good review of several adapters that would perform quite well.
If you are using the connection for gaming, no wireless will perform anywhere near a good pair of powerline AV12000 adapters due to their lower latency. So if gaming is important, I would reconsider your options.