How can I find out the used book website of OU.Thanks

[spring123]

How can I find out the used book website of OU.
Thanks!

 

[蓝色香谢里]

你要什么书，我有好多要卖

 

[Zyy.]

i often use the following website to sell/buy (used)books.

OU's Exchange board:
Exchange Board

Agora: Agora Bookstore: Splash Page

another one is on Facebook, you can join OU's network and find out the used items on your "Marketplace".