Looking for a portable sub- self powered?

[Craven Sound]

I have a small job coming up and would like to add a little thump to it. I'd like something that can fit in a Subaru Outback with other gear, self powered is preferred, but not a requirement. The job isn't paying much, so as long as I break even, I'll be fairly happy. Let me know if you have a sub or two you're willing to part with.