I'm thinking of buying a used NSX and am choosing b/w 2: Both are 1991s. One has 68,000 miles and the dealer is asking 31K; the other has 49,000 miles and the private seller is asking 29,500. The only problem is that the cheaper one is 700 miles away. I'd appreciate any advice people can give me in terms of whether these are good deals, repairs I might have to look out for, if it's smart to buy one with 69,000 miles, etc. Thanks.