I just bought #32, which was as near to perfect as a "used" car could be. It has just over 13,000 miles, with no mods to speak of. After going over every square inch of the car, inside and out, over the course of the past two weeks, I will confirm that it is impeccable. I've not seen its better.
Its hard to peg a price for such a limited edition/limited market car. However, I will say that as a recent buyer, my decision was based almost entirely on condition, not miles. It happens that the car I found had very low miles, but had it been rid hard and put away wet, I wouldn't have even considered it.
I don't feel it appropriate to divulge the price I paid, but I will say that it was a bit more than I was willing to pay until I saw the car in person. Then I caved in and bought it

It wasn't cheap.
If the car in question has 50K miles on it and is in pristine condition, I would say its worth around $70. If the condition is less than pristine, then start deducting from the price the cost of making it pristine. Honda certainly isn't building any more of them. Factor in the cost of timing belt/pump if it has yet to be performed. I just had it completed by SOS. That adds 2k to the price of admission.
As far as modifications go, the question is whether they are easily reversed. Aftermarket muffler doesn't worry me, but I would certainly like to see the stock exhaust included in the deal, or reduce the price. Heavy mods or those including body or paint work would reduce value significantly, in my opinion.
Since I'm the guy who most recently put his money where his mouth is, I am entitled my opinions, however goofy they may be
