The market for an NSX is small to begin with, and with a heavily modified NSX, the market is even smaller. You will have to wait for just the right person, so the wait will very possibly be a long time. It is also a low HP turbo car. I think if someone wants more HP, then they will want at least 400 RWHP. On top of it, people are a bit scared of a FI car. Who installed it, and more importantly, who tuned it? (rhetorical questions). If it were running lean at some point, it is near impossible to determine without engine breakdown. Also to check bearings, etc. is very difficult.
I am currently doing a HIGH HP build, and I WISH I could jump into your car for only $38k. Granted, for a high HP NSX, I would pull the motor out and sleeve the block, go closed deck, design and build new rods, design and build new pistons, etc, etc,etc, but you already have the wheels ($$$$$), suspension, the brakes, the paint, the clutch, the hood, headers, some electronics, and it seems to be in excellent shape.
I bought my 93' for low $30's, and I have COMPLETELY redone the engine, and upgraded many other components. I have probably about $30k in upgrades, and I still don't have everything I want. Someone with the desire to have a nice NSX with the upgrades you have is WAY AHEAD of the game at $38k.
Hang in there, this is a GREAT DEAL, and trust me, I have been paying for many upgrades, and it adds up, QUICK!!! Many people don’t realize how good of a deal it is because they don’t have (or want) many of your upgrades.