Anyone who thinks they are going to get a "quality" turn-key business for $30K, either sets their expectations very high or is smoking crack.... Most business ventures start around the $50K mark and go up, $250K is not unreasonable for some companies. $30K for a well known, at one point trusted name brand is a pretty good price to me. The big question is how many bridges have been burned and if those bridges can be mended to have new product made, as mentioned above.
The innards of batteries are actually fairly cheap. Since the AGM batteries don't contain a lot of lead, that saves weight and cost of lead. Instead they use a wire mesh and fiberglass mat soaked in electrolyte (sulfuric acid). The manufacturing costs come from the machinery to make them and some of the raw materials, marketing, etc.
Wire manufactures have a relatively high cost (lower profit) because of the skyrocketing price of copper, aluminum (yes some wire contains aluminum), and gold. I have a friend who runs a company that manufactures ground straps for jets, and other government contracts. The costs of one of the high quality straps is upwards of $25 a Foot! In the car audio world, those prices would never fly so manufactures are forced to lower their profit margin and charge lower prices. Markup in retail used to be in the 500-1000% range, but today is usually 20-100% markup = less jobs for everyone. //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif