when you get him make sure he's well acclimated and look for signs of ammonia poisoning. I am not trying to scare you, but the betta I got that came 2 days late had bitten his tail when he arrived. Its been a couple of months and he's been sick off and on since then. He's bitten his tail so short! He was a beautiful OHM salamander and now he looks like a ragged PK. I have him in a QT tank for like the 3rd time because he was sick this morning - I thought he was dead!
Your fish may arrive just fine, as my 2nd thai purchase did. Just in case though !