I am in the not new crew. For me it is a matter of money. If I was better off I would buy new without a doubt. Since I am not very well off I try to make every bit count.
I had been shopping for over a year and a half before I purchased. 2013 Heartland Pioneer 25BH. It was first sold in February 2014 and barely used. Less than half the cost new. Not perfect new but close enough for us. I am one of those guys that can fix anything and have no problem working on a trailer.
If I had the means though I would much rather have new.