There are some ebay sellers listing 2611 routers(there might be others) as FastEthernet routers.
The 2611s come with 2 Ethernet(10Mbit/s) interfaces and the 2611XMs come with autosensing(10/100) LAN&WAN ports
Remember to search Cisco's website to make sure you are not being mislead by the typos on those ebay listings.
http://www.cisco.com/en/US/docs/routers/access/2600/hardware/installation/guide/2600ch1.html