[Tcoat]

I am going to take the opposing view point of many on the mods. Most seem to think they have zero value but isn't true at all. They most certainly do add value to the car if you want that mod. Why would it be better to run out and buy a stock one and then buy all the mods and put them on? The value of mods issue really doesn't rear it's head until the seller try's to up price the car some stupid amount because of them. It would appear from that list that there is actually a huge savings on the mods and the seller is very realistic in their price.
The fact that there is no warranty on a private sale isn't that big a deal either. The car is already almost out of warranty on age anyway. For the lower price of a private sale you can have some money in reserve in case something does break. If something major fails then odds are the dealer (especially a used car one) will probably try to not cover it anyway. Just have the car checked by a shop you can trust and if they say all is good then go for it.