That's really personal but in my own opinion its not worth more than 12 - if it was an original nut and bolt original paint, low mileage car (less than 20,000) maybe one owner maybe upwards of 20 - '91 isn't that old - if it was an 81 low mileage car bone stock car could be in the 20 range (in my own opinion) - it's all personal preference I had a friend import a 91 rx7 from Alberta he paid $19 for it - but again it was bone stock fairly low mileage cost him 1300 to ship by train - it sounds like a nice car tho so if that's what your looking for the price is secondary...good luck finding a fox there's still a lot of nice ones around.