i dont know much about pastel art but i think they're all awesome...maybe try something original and make your own comics...dont limit yourself...
Clearly I do not have the qaulification to criticize your work you perhaps need artists to do that .
Who would it appeal/sell to?that's the big question -
in my own limited sphere I would say team with a builder web,magazine or comics some folks are good with the process and not the art .
For a contemporary very successful web site that is complimented by strong artwork but does not necessarily feature it check out Lifehacker.com. Do you have original characters ?have you thought of creating an online comic?have you thought of offering online drawing lessons tease with free - upgrade to premium its the time honored way of finding a paying audience. Good luck.
Do you have a website portfolio of all your work?
You're talking about selling these but you know they are copyrighted materials, right?
I think you should take your sketchbook and think up some original characters.
I would recommend that you start by drawing from real life or at least a photograph rather than copying another artist's image.
These are far better than anything I could do freehand. Some of them could use some improvements but they are generally all very good.
Your work looks like in the area of advertising and comics.
They are great & I love looking at them.