Aaron, I purchased my 91 Reatta last week for $5,500, it has 76,000 miles. the car was for sale for over 28 weeks on Market Place. I have sold cars on Bring a Trailer, bought from eBay Motors and Facebook Market Place.
When I start lusting after a particular model car, I start by looking at all the online sites. Here I get an idea of the condition, mileage and price they are going for. Once I have an idea of the price and mileage range I will consider I start an earnest search. Pretty pictures attract people to look at your car. Once I am attracted to a car, I contact the seller and ask questions about the condition it is in, tires, brakes fluid changes, hoses, window and door seals, and all rubber mounts. I also ask if the car can be driven from where it is located to my home.
Depending on the answers I receive, I either pass or ask what is his bottom line he will take. I either accept or reject the offer. Keep in mind the Reatta is a beautiful car, but currently there are many more cars for sale than there are buyers.
Jim