Final Sound 600i: where to find support/pricing?

I have a pair of excellent condition Final Sound 600i speakers that I have not used in a few years (and sparingly before that). I would like to sell them but do not know how to price them other than a blue book value (which I haven't looked up yet). My search of the web, ebay, and Audigon has turned up next to nothing in terms of previous sale prices.

I am also unable to figure out who supports them, now that Final Sound is defunct.

Anyone have any ideas?
Sounds like you have already in part answered your question by looking it up on a blue book site. You may also seek the value from a dealer such as Overtrue Audio whose offer the service towards trade in.

Price them for half of what you paid for them and see what the market will bare.