What's the value of?...

[killjoymeg]

I'm wanting to sell a few AC items so to begin with could anyone (except coma) tell me what they think the values of the following items are

AC brotherhood flying machine, boxed and mint
AC IV water bottle (comic con)
AC III necklace and letter from gamestop, its in a paper box that is a little damaged
AC I xbox faceplate, new and sealed by matcatz

and also just wondering, what do people think the AC IV signed art print from the ace of spades competition is worth?