I really think this obsession over the snap ring is WAY overblown. If I were considering buying a car in the snap ring range, here's what I would do. I would negotiate a buying price that is ~$1500 less than that of a similar car that is not in the snap ring range or that has had the snap ring and transmission case fixed. I would know that I could incur a $2K repair at any time (which is true of any early NSX, since clutches and A/C can fail as well) so I would keep that amount set aside, just in case. I would become familiar with the symptoms of snap ring failure (loose shift knob, etc) so that I would stop driving the car if and when it happened and have it repaired immediately. And beyond that, I would just drive it and enjoy it! If and when the car needed transmission service for some other reason (clutch replacement, gear mods, crunching on the 2==>3 upshift, etc), I would have the snap ring and upper transmission case replaced at the same time. Besides all of that, I would just drive it and not worry about it. Very simple.