I've sold over a half-dozen books in Half.com, but I didn't realize this until now. Half.com doesn't just charge commission from seller, but also rips off shipping cost from both buyer and seller. For example, they charge buyer $3.70 shipping for a hardcover book, but then only reimburse seller $2.78. Where the heck does that $0.92 go?! And the seller probably pay more than the reimbursement. Without doing any shipping and handling themselves, Half.com does not deserve taking any from shipping cost the buyer pays for and seller supposes to get.