Yeah, what Howard and Malenko said. If you're on a budget, eBay isn't a great choice unless you're willing to get something "well-used" (read: needs work/parts out of the box.) That being said, I did get a refurbished $60 Porter-Cable router (bare-bones, no plunge base or anything) off Amazon that's perfectly fine if you're just using it for your arcade build. Ah, scratch that, it would be fine for most things unless you're woodworking for a living.
Also keep an eye on Craigslist and don't overlook yard sales if there are any by you. I wasn't buying tools last year by I did run across some older but completely useful tools. Often enough, the owners are more interested in getting rid of it than getting top dollar.