We've got small business discounts with both Avis and National. Avis was apparently more aggressive in setting up our accounts, as their rates are invariably significantly lower than those National offers. I'd love to take a spin down the Emerald Aisle, however, and see what things are like on the other side. I assume I'm just missing something with regards to rates, though, because if National were always $20 more per day than Avis, they wouldn't be in business. For the record, the Avis rates our company gets are generally about in line with the deals offered to Costco members--nice, but nothing earth-shattering. Any thoughts? What am I missing?