I just received word that Woot is blowing out refurbished Slingbox Classics for a low $70. As with all Woot deals, this is one day only and while supplies last. To answer the obvious question: A primary difference between the Classic and the current lineup is resolution. The new boxes broadcast at higher resolutions up to 640×480… However, unless you have FiOS, you’ll only see it on the LAN. So for most WAN and all smartphone playback, the quality is similar amongst Slingboxes.
In conjunction with the Woot deal, we (I’m employed by Sling Media) are running a secret ;) promotion for $20 off the 4-port Slinglink Turbo. This is a zero-config powerline ethernet adapter pair with four ports — meaning you can network multiple devices like my Xbox 360, TiVo Series 3, and Slingbox PRO… or whatever you need to connect.