The only way you trade Buff is if he doesn't want to be here and from all accounts, that is not the case. From what i've heard, he enjoys playing here, he likes being 3 or 4 hours from home, he enjoys playing in this market, he's having a good time out there, ever been to a practice? if not, should go, the guy having the best time is buff, the guy loves it here... big fisherman too, enjoys the ice fishing too, the guy is a good player and a difference maker, i wouldn't trade him and the only way i do is if he wants to be traded which i don't really think he does.
Want to talk about trading guys? I'd honestly, probably not now but in the off-season, i'd look at moving Kane and Enstrom.
As for picking up brunner, nobody did so what does that tell you.