auction dot com HOA feel and need some urgent help

[Account Closed]

If someone bids on a property at auction dot com, wins it (Reserve met) , gets cold feet, and backs-out (they have 24 hr period in which buyer needs to send out earnest money/ proof of funds and and close it within 30 days) .. This was user's first ever time on action dot com bidding. So far, Back-out is approved by action dot com (contract person forwarded request to supervison and sent following email.).... They have also removed hold from my Credit card... Is buyer off the hook at that point ? Or Action dot com and/or seller can come back with law suit or judgement ? The property has been listed now again on auction dot com

Also, Who's responsible for HOA fees if buyer purchase the prop ?

Email from action dot com---

"I want you to relax and know that this email serves as confirmation that you have cancelled the purchase transaction for the above reference property. You are no longer financially responsible for this transaction."