Raven, it might have some value to someone looking for the housing or the glass, but I wouldn't hold my breath. There are two with unspecified damage ("not working") on eBay at the moment for $30, and one that sold not too long ago for $31, so I'd say the demand isn't high. Besides - it's now 5 years old, so not a terribly high demand item even if it IS working. They seem to sell on eBay from $150 to $275 (the latter was a refurb with a 90 day warranty).
As for keeping it for parts, unless you have another 20" of the same vintage, probably not a lot of point in that as I doubt that there would be a lot of common parts between it and say, something newer.