The one item I have found to be pretty expensive to even sell, is the rifle harkness will give you if you ask to kill zimmer yourself. It's a fully charged plasma rifle but it it labeled differently. I had a crappy barter and still woulda got over 2000 caps. I think the value is something like (2112). That's compared to the medic power armor (800?) and the T-51b power armor (999). I'm sure there is something else out there worth more.... Anybody else got something???