Help me price my art plz

[Deetri]

Sooo I've started doing some requests for people and because I'm new to the whole selling arts stuffs I don't know how I should price my arts :/ I was hoping some of you lovely people can help me :3
I need pricing for these thingsh. I've put them in order of most expensive to least expensive

Chalk Pastel Headshots
Pastels Headshot 1

Coloured Chibi's
Coloured chibi 1
Coloured chibi 2
Coloured chibi 3

Lineart Chibi's
Chibi Lineart 1

Pencil Drawing Chibi's
Pencil Chibi 1

Soooo what do you think? I know that the fact I can't get scanned pictures of them will hurt the pricing a bit, I am working on getting a way to scan them in though so at least thats good. The Pastel ones would probably be a fair bit more because they are alot harder to make and much more time consuming... Also do you think there should be a difference in pricing for single chibi's, couple, chibi's, and group chibis?

So yeah, anyway thanks for taking the time to look at this and whatever. And double thanks if you actually reply with some good ideas for pricing. If you have any questions just ask! I'm kinda dumb so I've probably missed something out or done something wrong knowing me wink