I paid $65k plus $1k shipping and $1k trip to look at it a few months ago in California for a silver 99 with 52k miles looking like new, inside and out, top and bottom, no oil leaks. Dealer installed a new set of tires. I paid up at a dealer on consignment and lots of recent maintenance.
I paid around $1k to fix fan speed control, get key to work on driver's door, and rear hood struts.
Fixed the wiper washer motor myself for $40. Hard to find everything in a PPI. Actually the Acura
dealer was taking too long with the PPI like more than 24 hours so I said throw in a set of tires and it's sold.
Car was missing the red key. No problem there unless you want a duplicate key with Acura insignia on it. Remember the bad old days
before EPROMs when keys weren't programmable by the dealer, the security computer had to be programmed to the key, that is what the red key is for?
Car had $7,000 of recent maintenance like timing belt, seals, etc and was up to date.
I'd say your car needing a couple $3-4k of work on ABS system most likely replace with updated system, $1k for wiper switch, more miles
and unknown maintenance history is not as good a deal as mine. Count on $2k for timing belt, $1k for CV boots, $700 for fan speed control and who knows what else for whatever?
Why don't you take it to Carl at C&M in Stafford for a PPI? He often has 3-4 NSXs in his shop. He can tell you how much to get it up to snuff. He has worked on NSXs for 20 years or more and now has his own shop. 281-498-6364 His labor rate is $95 an hour vs Acura dealer $150. Acura dealer PPI may be dicey as technician likely may have not been around from 1991-2005.
$60k seems a little steep to me given the unknowns... Why don't you drive 60 miles to my house near Sugar Land and I'll give you a look/see and ride in my 99? PM me.