GUESS HOW MUCH? Jennings Crown Royale auto?

I need some advice; I am about to buy a Brandon Jennings Crown Royale AU RC #/399. I know it's not listed in Beckett yet, but how much would YOU pay for this card? What is a reasonable guess of how much I should pay? What do you think it's worth?
The more feedback the better!

---------- Post added 07-08-2010 at 02:46 PM ----------

Can anyone help me out?

---------- Post added 07-08-2010 at 05:11 PM ----------

Come on guys, someone give me some advice

---------- Post added 07-08-2010 at 11:39 PM ----------

Someone help me out!

Have you checked ebay's closed listings? Even if no Jennings are there...... look at other players of the same type of card & then you should be able to come up with a figure of what jennings would sell for...