I'm surprised that the "real" Discount Tires (ie the chain) haven't done something about this. Even if the guy was reputable and gave good service, most businusses wouldn't want another unassociated business to share their, but especially so when the guy is rude and displays bad business practices...
Anyway, good luck with the rims. Hopefully they'll get to you just fine, and on time, and you'll end up with a good deal after all =) Maybe he sells them so cheap online because anyone who actually goes in and talks to the guy turns around and walks right back out
PigLick