your car is worth more then what others are saying. It's hard to find a cleaner 300ZX that won't require mechanical diagnoses within 2 months of purchasing. It appears your car is a good candidate if the engine build is done correctly. Position the work, mods and maintenance to a buyer who gets what these cars take to keep them running right and you'll get a lot more than 10K. My guess and guys if you want to flame go for it as much as 14K.