I want the logo to be bold. simple, and in your face. I am imagining the words "WE BUY BOOKS" front and center in a bright orange style similar to the dunkin' logo. There could be some darker green accents to represent sustainability and being conscious of the environment but they're not necessary. (I included barnes and noble reference because I like the green color.)
If you use fonts that require a license, confirm with the client they're ok with it. For licensing reasons, it is better to provide your client with information on how to acquire the font rather than providing the actual files.