I have a brand new Quiet One 3000 pump. Only used to test the flow if I used it for my return but I stuck with my Quiet One 6000 instead.
It has a 1" union already on the output end that I could throw in or remove...
I kind of wanted $60 for it since its brand new but since its just laying around anyways, I could go $50 if you want. Its a bit more than 500 gph but depending on head loss may be ok...
Let me know
http://www.jlaquatics.com/product/wp...ater+Pump.html