I'm in the market for a 1998 or 1999 Cobra. I love the body on the 1998, but also like the IRS on the 1999. Anyway, I've found a convertible 1998 that is VERY affordable, but it has 100,000+ miles. Is this something that I should avoid completely, or would I be able to maintain it at a reasonable cost? What about the performance? How long can I expect the engine to last? At the price, it would leave some money in reserve.