If anyone's in the market for the Scangauge II, Amazon will have it on sale as a "lightning deal" starting at 12:00 Eastern.
Around this time last year they did something similar and it was selling between $120 and $130. So I would assume their price will be something similar this year, which would be $30 to $40 off the current price.
I've got one and I probably recouped my investment within 6 months since it helped me change my driving habits and increased my MPG's by over 15%. For me that 15% increase in MPG's means I'm saving over $200 per year in my gas costs.
Here is the link to the Amazon web site. But keep in mind that it won't go on sale until 12:00 Eastern which is a little less then 3 hours from now.
http://www.amazon.com/gp/product/B000AA ... slickdeals