Ramteq Pressure Washer Quality and Price Check

I may pick up a couple used Ramteq surface cleaners this afternoon. Does anyone have any experience with these surface cleaners? He’s about 45 minutes away, so Id like to get somewhat of a decent deal.

What what be a good ‘used’ price for these? One is a 30" and the other is a 16".

He’s asking 500 for the pair, but I was thinking more around the 350 range? Is my offer to low?

I’m not familiar with that brand.

Buy new and save your self the trouble.