I'm looking at buying a '16 st with 17,000 miles on it. The one owner before me had it straight piped with borla exhaust and modified the suspension. The dealer said they put the exhaust back to stock leaving the borla setup and put the suspension back to stock. It's an st1 and the dealer is asking 20,995. Do you guys think I should buy it or leave it? And how much do you think the previous owner abused it?