Alibris reviews

Alibris is an online marketplace for buying and selling new and used books, including textbooks, novels, and sheet music.

Features:

•  you can get paid either through a direct deposit or a check;
•  they provide you with full access to your affiliate commissions and statistics so everything is transparent and you can optimize your marketing if you need to;
•  they increase your commissions from 5% if you're a top performing affiliate;
•  they have books on various topics, including music.