Not following how that's odd - even though there are plenty of good used cars at good prices, it doesn't mean that all dealerships price fairly. Once you find one that deals in volume and doesn't play games, there are plenty of cars to be found at good prices.
I'm also not understanding why folks want proof or links to these cars, I already posted a link to a dealership that sells them. I'll play the game for the lazy and give you an example, a 2012 Chevy Volt that listed for $40k that you can buy today for $14k (with 38k miles).
Atlanta,GA 2012 Chevrolet Volt Used Hatchback Jonesboro,GA Roswell,GA Hennessy Mazda Buick GMC | A43583 | 1G1RA6E48CU113106
Here's another, a 2015 Ford Fiesta SE for $11k, list was $16k (with 19k miles). Yeah I know it's not 40% off but this car is brand new.
Atlanta,GA 2015 Ford Fiesta SE Used Hatchback Jonesboro,GA Roswell,GA Hennessy Mazda Buick GMC | DR43377 | 3FADP4EJ6FM111394
Here's a well-optioned 2013 Chrysler 200 for $13k (with 39k miles), listed for $29k new.
Atlanta,GA 2013 Chrysler 200 Touring Used Sedan Jonesboro,GA Roswell,GA Hennessy Mazda Buick GMC | A43220 | 1C3CCBBB1DN584789
And don't start whining about domestic makes, I simply said there are plenty of 2-3 year old used cars for 40-50% off of MSRP. You can doubt that's the case all you want if you don't bother to really look for them. I personally don't care if it's domestic given how much better cars are nowadays but I know plenty of folks turn up their noses at anything non-Japanese.
And you do also know that you can hop on a plane and buy a car anywhere then drive it home, right? This place is 10 mins. from ATL airport, straight down I-75 south.