these are honestly very impressive and you could probably get a good sum for them, but i agree that it also depends on how much time you spent!

5

Probably 80+ plus but it also depends on how long it takes you. I’m an artist and I like to charge for my time as well as skill level.

4

Very impressive but I do think you can improve more. I assume you’re mostly just copying a reference thus the varying quality of work based on the reference photo people have given you/you’ve found. I think you’d be able to charge around 40$(bottom piece)-60$(middle piece) from what you’ve shown here. The middle piece has a lot more depth with the dynamic lighting which I evaluated it more highly. Keep drawing! Keep improving!

2

Probably about 10-$15, these seem pretty on par for what I see in my school district’s middle school art show! Awesome start :)

-4