If you are serious about setting up a darkroom, you might actually be more selective and be willing to spend some money on enlargers. After all, it's the most important equipment in printing. You should be able to find Omega D2 or some Beseler for cheap, say 50 dollars max and be reasonably clean, functional, and basically complete.
I love picking up free orphan enlargers but parts for non-common types are hard to find, and you are bound to need something either to expand your capability or to repair. If I needed, say 6x6 neg carrier or condenser lens for my D2, all I need to do is to browse APUG classified or do a WTB post. Can't say the same for non-common types. I have a complete Vivitar VI but spare parts are not easy to come by and some are basically impossible to find now.