If you're planning on going to another expo for your next purchase, you might want to check out the BOI first. There is also a feedback forum here that you can post on and search to see if you really want to buy from someone.
As for feeders: Check FB. There are some feeder breeder groups there and you might be able to find a local supplier. Also, consider purchasing several months worth of frozen feeders. I like to use big cheese rodents and have also heard good things about perfect prey.com. If you order in bulk, buying frozen is usally a lot cheaper than purchasing live, unless you can find a good deal locally.
Good luck!