Looking at a used, 10 year old Pronovost 503 off-road dumping trailer for use hauling firewood. Does anyone have any experience with this trailer, or this brand? It seems like a very solid piece of equipment, but the price used is the same as a new 7x12 on-road trailer from tractor supply (which granted does not dump). Anyone have an idea of value for something like this? Seller says it was $3500 new. Am I better off just getting an old army trailer off the CL?