Doesnt sound good and I would stay away from something that sounds too good to be true as it usually is.
Im with gypsy on this one.
Also try hiring a couple of different ones for a weekend away to see what it is you really want and go from there.
Best bet is always have a really good look at it first, ask heaps of questions and a new one should have a warrranty with it.
Any brand that you are leaning toward besides the one on ebay? If so ask away here and see what feedback you get. Also the campertrailers.org website gypsy mentioned is fantastic for info and most members on that site have a camper trailer of sorts(hard and soft floor)