[moon111]

Think your ad could use some changing to make people feel comfortable. Yes you could say someone might 'know' all about these parts etc, but many won't. Instead of writing track-prepared, state the low mileage, that maintenance has been done, that only the best parts have gone into making the car reliable, perform better, etc. I wouldn't comment that you did the work yourself either. Do you trust a stranger's workmanship? If someone asks about the upgrades, tell them. But otherwise, I'd dumb down the ad for those who have the money, but don't necessarily have the time to know what they're buying. Make this the safest purchase they've ever made. An investment that will appreciate as these become collector's items.