So I currently have a 2016 3.8 ultimate a/t with about 28k miles. I have cbe, test pipes, aem intake and a custom sfr tune done along with some exterior mods. I have been looking to put a turbo in, did all my research and was really just waiting to save enough money. I came across a 2015 3.8t rspec for sale with only 11k miles. It's a m/t which I was contemplating switching to anyway. Hes asking for 18500. Kbb value for my car says about 18-20k (if I return to stock)All the mods were done at professional shops but I was wondering if there was anything I should look for or have checked. I will post all of the mods done to it below. Thanks in advance for any input.