3 Older Tivos and Wireless Adapters

What's the market like for older, working units? I have the following:
- Tivo Series 2 Single Tuner w/ Weaknees 80Gb upgrade
- Tivo Series 2 Dual Tuner 80GB
- Tivo Premiere XL HD
- Tivo Wireless N adapter (used)
- Tivo Wireless N adapter (NIB)

3 Older Tivos and Wireless Adapters