How much to charge library distributors when they order a single copy.

[Tanaka]

I've been getting orders lately from library wholesalers like Brodart, Follet, and Emery Pratt. Brodart orders in bulk, but the others places order one book at a time. I usually charge 50% to wholesalers/distributors, but if they are only buying a single book it isn't really worth time to pack it and ship it for the wholesale price. The purchase orders don't ask for a specific price....sometimes they just say "The maximum discount possible". What do you folks generally charge in such a case. I'm tempted to just charge full price on these single order books and see what they say.

In case you're wondering, the book is Everybody Dies: A Children's Book for Grown Up

http://www.amazon.com/Everybody-Dies-...

I'm not using one of the large distributors so all these little orders go directly to me.

Thanks in advance everybody and happy holidays.