Glad to hear you took him home
Leave him be for another week, he might be stressed out. How big is your enclosure? You might try putting some balled up newspaper in his enclosure, it helps them with the transition (worked wonders for one of my BPs). My first BP didn't eat for the first week either, just wait a week, if he doesn't eat, no biggie, just try in another week. They go a while without food.
Good luck with your new snake!!