As far as I know (and i'm no expert), trappers usually top out at about 4 1/2" handles, and the butt end is wider than the blade end. The folding hunter usually starts at about 5" handles, and the blade end is wider than the butt end. Then there's the copperhead, which is the size of a trapper but is built like the folding hunter, but that's another discussion altogether.
For $180, that UH better be genuine stag. I snagged the 227UH in that picture for less than $75 on the big auction site.
Edit to add: I believe Queen is still making their folding hunter in a couple of handle materials and D-2 steel that will out perform the UH, assuming you can get an edge on it.