I think I have decent experience to discuss this topic as I did few deal of buying the cars like hobby bisi in Emirates auction and I feel it’s a bit cheaper and what I understand from that is there are cars from the banks, court, police and from garages (who repair the accident vehicles) and so on... yes comparatively cheaper with market prices from used car markets and websites like dubizle, but the thing is we have to be smart enough to chose the right car to bid and win. It’s like a guess and proper inspection at the auction (as Emirates auction allows to check the car in start condition) you can select the cars and go to the auction center and surrender the Emirates ID and collect up to 5 keys and those can be checked and we can make our mind for the right choice and come home and start bidding only on the end time just before 5 mins, and if we have to fix the price for the car with all other charges and if worth to bid can continue else just forget and look for other cars, in terms of documents when u choose the vehicle check the terms and condition before as there are documents clearance upon payment and some will be have issues like court and other formalities which usually take more time