What are these guys going for? I've been checking the clasifieds, but never see them available.
That's a good indication right there.
To illustrate: You won't find many Super Blacks for sale either. Last year, Super Cinnys were going for 3,500 on KS (the whole 1 or 2 that I saw for sale anyways)... when the available animals group is that small the seller sets the price- it's not really a "market price" since the availability is limited. Most folks producing these are hanging onto them.
Not everything that is available or getting sale is on the public market
If you want to sell it, sell it for what you think it's worth to you. If you don't sell it, keep it, it will make it's value over time. But if someone is offering you good money for it, may be you could buy something nice in return or trade it for a morph you don't already have.