Amazon has the Mini on sale for $79.99 with free 2 day shipping for Prime members. Don't know how long that will last.
Here is a link to it, enjoy
Roamio Pro- $99 yearly MSD
Roamio- 3TB w/PLS
Premiere- 2TB w/PLS
TiVo HD- 2TB w/ PLS
Series 2- Sent to the great recycler in the sky
Connected via MoCa, Ethernet and wireless adapters.