If you need really good wifi performance for the money, then try the netgear R6200. Brand new, it will be above your price range, but used, it will be in the low $70's
it is 2 stream router which matches pretty much 99% of the available wirfi adapters (very few actually use 2 streams)
If you do not need 802.11ac, and want an extreme amount of stability, then check out the Netgear WNDR4700 (I currently use it and have not needed to reboot it in nearly a year (and the reason for repoting it in the past, was a firmware update
http://www.amazon.com/gp/product/B0092ML8QW?ie=UTF8&tag=small0c-20&linkCode=as2&camp=1789&creative=9325&creativeASIN=B0092ML8QW it is $87.77, and still is the most stable 802.11n router that I have ever used, even more stable than my R7000 (which is still getting firmware issues worked out by the company). Only issue is that it does use a small fan to keep the router cool (another limitation is that it does not support dd-wrt or open-wrt due to the CPU they used. (CPU designed for a NAS and not more specifically a router)