Over the years I have always bought the vehicle "dealer" service manuals for my vehicles. A couple of reasons for this, 1st...I can see if the repair is something that I'm comfortable preforming, 2nd...it helps me understand my vehicle somewhat better, 3rd...if I do have to return to the dealer for service, I have a slight understanding of what is going on and what to expect. With this being said, I have been watching Helm.com for the publications availability. As of today, Helm has a "Honda Interface Module (HIM) Refurbished Unit (whatever that means) on sale. Damn, what a surprise...cost $553.00. Think this is rather crazy and way out of line for cost. Wondering if anyone could explain what unit is? Thanks for any help provided!!!