Best place to sell old study books?

[ConcreteBuffalo]

I have a number of second hand study books that I'm looking to sell on - considering they cost me around 40 quid each it would be nice to recoup some of the money spent on them.

I've looked on ebay and similar auctions typically have no bids when they close so seems like a waste of time. Googling has brought up a few options, including sell student stuff, but can anyone recommend a decent site/service from past experience?

[purplepolarbear]

Amazon - if someone is looking for that title they may see yours and go for the secondhand one if it's priced lower.