I would not buy any used car without looking at it in person and hearing it run first! This price my be a bit more than I'd pay for this car, I'd say between $30-34K depending on the options it has. I'd like to see the Roush sticker for it. You can figure $7600 for the Roushcharger if you can install it yourself, closer to 10K installed. What is book on a stock 2014 and figure the difference. Plus seats, exhaust, suspension....
I met a gentleman last year at Road America who had just purchased a very similar 14 Roush RS3 with 6000 Miles for $36k.
You can contact Roush Performance to confirm the VIN number and that it's a true Roush and not a clone.
https://www.roushperformance.com/
I just looked at the ebay ad for it and the car looks legit and pretty clean, drivers seat look a bit worn for what he claims "show quality inside and out" but I'd still go check it out in person before purchase...
This could be an aluminator, ask Roush that when you call em.. that would make the value a bit more...
I just looked at the auto check and last service listed was for transmission...
he's only had the car 4 months and now selling it.....