I bought my toilet from the local Camping World on sale (and used my president's club membership) for around $200.00. Installation cost from them was around $60.00. I did it myself for the cost of 4 trips to Home Depot (gas) and about $5.00 in braided pipe. I really was expecting nastyness under the old toilet, but doing it when it's cold (less smell from the tanks), and gloving up eliminated the worrys. It wasn't too bad under the old one, and I cleaned everything while I was there.