Best way to transmit video from a PC to a TV wirelessly

I'm not sure if this is the appropriate subreddit, but I feel like this is the place to ask.

I have a PC in my study that I play games on. However, I just recently bought a wireless Xbox 360 controller and it turns out to work well in lots of games I own. I would like to play the games in the living room but not have to move the PC from the study. Is there a way to do this wirelessly for cheap? Wireless HDMI transmitters seem to cost upwards of $200..