Just picked the same one up a couple weeks ago. Managed to get mine for $45 (it was an open box one). It works pretty well for detailing thats for sure.
It says that you should use power washer specific products but would I be able to put car wash soap in the tank and use it. I got the same one and it turned out that it was the 2000psi one instead of the 1800 and I got it for 99$ also.