I would go with the 2016 unit personally.
It is pretty easy to identify any welding issues with the frame. The slide side will have more cracks than the door side, you can always have some gussets installed and negotiate that cost when you decide on an offer.
Some other things to look for, cross bolts on the hitch. The original hitches had a tendency to bend up. The cross bolts stopped this from happening. Some wall areas pulled away from the bottom of the frame, look for gaps between the floor and walls on the interior, specifically on the front of the slide to the storage area. Easy fix. Just remove the diamond plate skirt, clamp the wall and frame and install some heavy fasteners to tighten things up.
These trailers just last. We are still very happy with our 2015.
All the best.
It is pretty easy to identify any welding issues with the frame. The slide side will have more cracks than the door side, you can always have some gussets installed and negotiate that cost when you decide on an offer.
Some other things to look for, cross bolts on the hitch. The original hitches had a tendency to bend up. The cross bolts stopped this from happening. Some wall areas pulled away from the bottom of the frame, look for gaps between the floor and walls on the interior, specifically on the front of the slide to the storage area. Easy fix. Just remove the diamond plate skirt, clamp the wall and frame and install some heavy fasteners to tighten things up.
These trailers just last. We are still very happy with our 2015.
All the best.