Terrible
I ordered a book, via Abebooks but fulfilled by Toscana Books, on January 9, and by March 10 it still hadn’t shipped. After asking for the order to be canceled and a refund issued, they stonewalled and shipped the book anyway on March 26. There is no communication with Abebooks ever, it’s all between the secondary seller, so you have no third-party recourse if you have a problem. Abebooks must just be a clearinghouse website that has no actual employees. Anyway, if you can get books elsewhere, go elsewhere.