Magical Chaise. So I could flip it and corner the market on bonk 3
Woulda been a cool game to own.  Kinda in the DE2/Bonk 3 camp with those 1992/1993 TTI releases that are so hard to come by.
Terra Cresta II. 
I LOVES SHEWTIES. 
Wow!  I had no idea about Terra Cresta II being so expensive, damn!  Fleabayers seem to have it going for $250...
Long before the current gouging, Terra Cresta II was an expensive HuCARD.  
I've played Terra Cresta in the arcade a long time ago, and I think I tried TC2 on emulation at one point, but maybe I should go back and see what the hubbub is about.  Must be a good game!  Don't worry about further buying competition from me though, I'm not a player at those prices.
Kaze Kiri or River City Ransom.
Both are in the $180+ range.
I think Kaze Kiri looked really great but feel it's kinda overrated once you play it.  DNM would be nice, I remember trying to buy it back in the day (early 2000's) but never found a deal I cared for.  Love me some Kunio games.