Price cut on Holman tap timers if you need one. Looks like the solar powered one goes for ~$100 on ebay.
Also:
Holman Digital Tap Timer With Wireless Moisture Probe $49 (was $65) - the probe seems like a cool idea
Holman 2 Dial Mechanical Tap Timer $39 (was $58)
The Probe is a good idea i have a digital one now and the battery has lasted well over a year but the probe would be great.