400W MH ballast for sale or trade

[Dozer]

I have a couple used 400W Magnetic M59 ballasts and was wondering if anyone out there would be willing to trade me something smaller for one of them? I'm going to set up a small tank (20gal) and 400W is just overkill. Maybe someone has a 250W ballast and we could work a trade? Or if there is anyone who just wants to buy one, let me know that too of course. You will notice by the surface rust that these are definitely used, and of course used stuff in return is great too!