The site you are probably referring to
https://onlyusedtesla.comThere isn't much on there, but there are a few.
All the sites I used beyond that:
https://teslamotorsclub.com/tmc/forums/tesla-for-sale.70/https://www.cargurus.comhttps://www.autotrader.comhttps://www.cars.com/https://www.ebay.com14 Craigslist markets (each of which covers a wider geographic area than just that city)
I really like cargurus because you can select the specific version of the Tesla, so you can filter out the 40 and 60 kwh cars, or just for the 60kwh if that is what you want. It is a very nice interface for car shopping Tesla's.
I have agreed to buy a 2014 P85+ . We have to wait for some seller paperwork to go through so I won't be picking it up until the 21st.
I was actively negotiating on the following cars 2013 85 in New Jersey, 2013 85 in Phoenix, 2013 85 in San Francisco, 2013 85 in Orland Park, when the 2014 P85+ auction on ebay came to a close at a much lower than expected number. I was the high bidder but under the reserve price. The seller then came back with an offer that was much better than anyone expected. I talked him down a 1000 from there and agreed to buy the car. It is a private party sale so I will get to save about 50% on my sales tax bill!
The + in P85+ is for the advanced handling package. It is set up to be a firmer riding, better handling drivers car.
I search and compete cars nation wide. I prefer NOT to buy local due to amount of abuse old man winter and road salt dish out to our cars here. I prefer to avoid the hot climate cars like Phoenix as that is hard on the interior and potentially battery. Atlanta is a good place to shop for EV's, as they had substantial rebates for many years, and a climate that isn't hard on cars but surprisingly few Tesla's there, plenty of Leafs though!
I also used this guide on the older Tesla's
https://teslamotorsclub.com/tmc/threads/decoding-tesla-model-s-vins.7638/to confirm they were the battery and charger that was advertised.
To answer the other question, yes, I bought it JUST to test my car charging build
And also so when every person I explain my charging set up to asks "do you have a Tesla" I can say "yes". That is the most frequent question I receive when I explain what I am building.