Don't buy from them. The are just like used car salespeople. No difference! Rip-off!

I know it has been a while but I will post my answer to help those who may have a similar concern. The advantage of Carvana is you can cancel the order right up to taking delivery and then even after as long as it is within the 7 day trial period. As far as credit that should not affect you if you were financing with them Bridgcrest (who services their loans) would not show the loan until around thirty days after purchase. Even if you are doing your own financing this should not be an issue, also you are allowed multiple inquiries for auto financing within a certain time frame.