This is what I was thinking, as well. Usually, when I trade with an LCS, it's generally easier, I find, to get one big book for several smaller hot keys. Surprised your guy is willing to go reverse. Then again, maybe if he's deep, he just wants one in the shop. Cracked out, in Mylar on a wLl, it would look even better as an LCS showpiece.
I agree on the trade elements too. 181 great, but I'd want top bronze keys across the trade. (129 as Miraclemet said, or very sharp HOS 92 or X-Men 94. Maybe something else is also acceptable, but it's a short list. WWBN 32 is cool but scares me as it has heated so long for so little reason. MK is a cool bit character but he's a bit character to tie up a quarter to a third of this trade's value. If I wanted a spec book in the lot, maybe a sharp GL 87 for a much smaller percentage of the total trade?)