Hi, Rich...When I first started my shop, I sold old school cut-and-paste ACEOs. I was inactive for several years, then reopened my shop selling digital downloads.
I was doing quite well until September, when my shop was among tons of other shops that fell off the face of the earth due to Etsy changes.
When people order from my shop, they usually buy several items at once, but the sales lately are few and far between.
Right now I'm trying to decide whether it's worthwhile to keep adding things here, or concentrate more on my various POD shops.
I was under the impression that we couldn't sell images of recognizable characters, whether or not we had drawn them ourselves, such as your Batgirl and some of the other items you have listed.
I might be wrong on that though, so hopefully somebody else will chime in on that.
Wishing you much success here,
Becky