I have several modems at home because part of them are older models which do not support the new speed and part of them are given as a package.
Right now, I have two which are still working. One is a Linksys and the other one, I am not sure what's the brand. I was told that the ISP is going to give us another new modem because the current one may not support my incoming 4Mbps internet broadband.
So, if you are looking for used cisco, do check out the link given because I am sure a lot of people like me have a few of used cisco to dispose off at good price.