Perhaps you should contact Tesla CPO to see if they have anything in their stock. Probably a 1.5 with high miles for that price.
Tesla website page listing Roadsters for sale shows cheapest in high 60's. And most of the Roadsters for sale their are a Sport models that are priced much higher. But some of them have been for sale for months with. no takers so I think they are pricing them too high. But they all have 3 year warranties and that is worth some money for sure.
Tesla CPO is not a complete list of what is available. Go into one of the stores and ask and they can see what is listed in their inventory.