Few things to remember…
1. They want the full amount. No finance is given.
The following might change but normally..
1. Car will come without its 3rd service. You have to service it yourself.
2. Car will come with no warranty compared to buying from a garage.
What some do is they try to find where the car goes after they return it and then buy it back from the auction (cheaper price maybe) or a garage which will give a warranty and probably service the car for free.