the converter wouldn't be an option and the Roo never had an optional converter offered.
if you're using NADA for values, you aren't supposed to be adding value for things that are standard, even if it happens to be listed as an option on their list.
things like awning, microwave, oven, a/c, and so on, are often standard "options" that you would get anyway. you would have to order it, from the factory, without one of these so-called "options". they're often a part of a "package".
so, you can't add value for these things, UNLESS it's an upgrade, like getting a 15k a/c, instead of the 13.5k standard a/c.