Brake bleeder for cheap
 

If you want a power bleeder for cheap, around $35, it's easy to make one, just get a garden sprayer and attach a Motive hose to it. It doesn't have a pressure gauge, but if you just open a brake valve and pump until fluid starts to flow, you know how much pressure you need. I use it dry and it works great.

RL Flo-Master 1-gal. Economy Sprayer-1401P at The Home Depot

Motive Products Brake Power Bleeder Adapter MP 1100 | eBay