Cheers guys.
To be honest, I wasn't on the lookout for any dragon, but I know a nice sculpt when I see one. So I did some due diligence and checked RP dragon prices on Ebay. They ranged from $5,- to €250,- , averaging heavily to the lower end of the spectrum.
So I offered them €20,- , thinking it was a sharp bid, but not ridiculous. Turns out they were expecting something in the area of €300,- !

Which is when I pointed them to
www.ralparthalegacy.com for a reality check on their price expectations, but of course this particular one wasn't listed there and the first reference I did find was on the Reaper forums (which is where the painted pic is from).
Turns out they did not know which dragon they were offering, so they thanked me for that referral, but I'm not any closer to finding out what a reasonable amount would be for that model...

I'm not hung up on it though, and I'm not really set on buying it either; it was just an opportunity I ran into, but now I am curious to find if it truly is worth that much...