Found this posted on Slickdeals this morning.
http://slickdeals.net/forums/showthread.php?t=2323665
Order through Amazon and you need to use the coupon code
SCANGAUG as indicated to save $30.00. Not sure how long this offer will last so jump on it if you're interested.
3 months ago I would have passed this over not knowing what a ScanGauge is, but thanks to you guys I'm in the know now
Don't have the RV yet but figured I might as well get one and use it for the cars and figure out all the settings. Will have enough other things to learn when I finally get the van.