AA traditionally sells equipment for retail showroom demo purposes (all kinds of switching devices for A/B speaker, receiver, etc. comparisons). This is one of their first products that found a niche consumer market but, because of their roots, they never thought about 'dealer' pricing or distribution. Consequently, I can order from AA, but there are no dealer discounts so I pay the same you would pay.
Copperbox, and one other mail order house that I can't recall the name of, where the only two places that must have some sort of volume discount agreement with AA.