How much money have you charged for them in the past?

In the past, is this : http://d.facdn.net/art/ninjachu/144.....sheetprice.png

But I think is too much expensive.

à mon avis, change pas le prix, je les trouve correcte ! ^^
(Ouimaispourmoi,jemenfouslesprix,jeprendstoutxD)

that is actualy cheap compared to other artists i've seen o3o

It'd be very hard to make a good amount of money with those prices
You should add at least $10 to every option in that sheet imo

Oh? Maybe , I think increase a little bit, but not too much, that I think I will not have enough to ask.
Maybe of 4$ on every option. >.>

That is cheap compared to most artists, I would suggest raising them just a tad.

That's what I think , it's difficult to found the just middle. ><'

Yeah, I think your art has enough demand that you can raise the price by at the minimum two bucks, but I have never done this kind of thing before. Perhaps you could consult another big account on how to price your art?

I don't think it's too expensive. I think it's a little cheap because you are very talented and your art style is refined yet casual.
It feels comfortable and I think that's what a majority of watchers and commissioners want.

Plus, your artwork looks amazing~ I don't want you to be underpaid and you deserve much more than that uwu <3

It depends on how you feel about your time.

But I'd at least add 5 dollars to the options. Get some money!

Maybe you should raise the prices so they're increments of $5? So going off your price sheet it would be $5/$10/$15/$20/$25, or you could change it up so it's like this $5/$8/$10/$15/$20 instead. Those would be fair prices, expecially of the quality that you do!