Almost nobody, if they have to order it in special for you anyway. You're only likely to get significant discounts by finding something in-stock in-store.Thanks for all the input. I checked the catalog and the rack is $150 and the cheapest 46L case is just over $300. Who gives bcsb discounts?
+1 on quality of GiviI got a great deal on an E460 case at RMS around inventory time (better than mail order), but I don't know that they keep much stock on hand. I'd second the idea of looking for used stuff--places like sport-touring.net, advrider.com, etc.
FWIW, the GIVI stuff has held up very well for me and I wouldn't hesitate to buy more.