[Nefer]

Lol, hey there Roachi ^^
And normally yes, they are, though some people sell them underprice, like this one:
http://www.trisphee.com/forums/showthread.php?t=4390

And some sell them overprice...Which I shall not state here for obvious reason xD

And some sell them at one or another price guide, like here:
http://www.trisphee.com/forums/showthread.php?t=5281


So I guess if you want to make a bit more money you can just go with Sam's guide and ask for the highest price on it (like for example a Frostbite is 5000-6500, so you can ask for 6500). Or you can just tell people you're using _name of the guide_'s guide and they'll offer you a price ^^



Edit: I actually got my kitsune (Japan) for 5k...but some people got it for 6-7k, it really depends I guess...