yep I echo 619DioFan’s sentiment… craigslist is your friend. Otherwise I’d try and make your own if you’re feeling handy. I built a few of my own and really the trick is knowing what you want out of a work bench (height, how wide of a work surface, place to hold your screwdrivers, or units to hold the power tools, bolts, etc…). Take a gander online at different set ups, and then go to a store like Lowes, harbor freight, HD or what have you and look at the design.
You can build one for relatively cheap if you already have some of the tools and material. I have an excess of screws, and lags so it was relatively cheap to frame out a bench with 2x4s and some spare 3/4″ plywood. Let us know what you end up doing!