Did some researching and reading. I found that the Cisco 2509 through 2512 are used as Terminal Servers, with the 2509 and 2511 being the most popular, at 8 and 16 devices respectively, with Ethernet instead of Token Ring (2510/8 port, 2512/16 port).
Cisco 2509, 2510, 2511, and 2512 - Overview of the Cisco 2500 Series Access Server - Cisco Systems
I also learned you can use a 2600/3600 series and add an NM-16A or NM-32A card to them, but looking at eBay, this does not seem to be a very cost-effective solution for a terminal server. Is this correct?
An Octal cable can be had cheaply (~$25) from various sources such as MonoPrice etc.
Is it worth it to look for an -RJ model of the 2511 for any reason? Or just get the best valued 16/16 2511 in good condition I can find, and grab an Octal cable for it?
If it matters I will be using this beyond CCNA level stuff.
Lastly, what is considered a "great" price for a 2511?
Thank you.