I paid 10k for my Z and after adding up all the receipts in the folder given to me by the previous owner, he put over 25k into her, including the original price he paid in 2000. I plan to put about 2k into her before I am satisfied and mostly it is going into safety gear and preventative stuff like traction lock and a 2 core all metal rad. The cars an auto and will break tires at 30mph and I haven't touched the NOS yet!