E-mail me at firstname.lastname@example.org and let me know what books you want. Once I confirm your order, you can pay via the PayPal button in the sidebar, or (preferably) via check sent to:
c/o Michael Sharp
54 Matthews St.
Binghamton, NY 13905
All prices include shipping anywhere in the continental U.S.
PS You are free to haggle about the prices. It might get you somewhere, who knows?