Not a bad price, $49.95 plus $5 shipping for 5 magazines for the Glock 23. Police trade ins but all that I received were in really good shape.
https://www.recoilgunworks.com/used-glock-13rd-mags-pack-p-41725.html
https://www.recoilgunworks.com/used-glock-13rd-mags-pack-p-41725.html