Worthy of doing an art pass?

You guys may have seen some of my art filtering around, if you haven't, you can take a peak at my deviantart, and I'm finally considering holding an art pass auction.

The question is... what should I value one of my art passes at over a month? 3? 6? a year?

What would you guys want the art passes to contribute to? Just tags/sigs and character sales? Or to large art? to references?

I want to know what you guys want and what you value it at coming from meeee.

Sooo, give me a hint, drop me a line, share your opinion and let me know what thoughts you have swirling around in your head! Thank you everyone! :D

Let me start off by saying that I am awful with pricing. But seeing your art, you could make some good money off of it. Illoria... You have great talent. And I see a bright future for you in the art world. But, back to pricing. What you could do, is start out low with your prices. Get people's attention. Then, once you find out what people like, start making more art. And raise your prices slowly. As time goes on, Keep raising your prices till you get to the average price for art passes or individual art. But, as time goes on, make what is already good, better. You already have great art. But, there is always room for improvement. That's all I really have to say. Good luck!
- Birdie♥