...Really?? Wow.. Premades? I have a graphic and digital media background. I do my own including creating my own typography and logos. I priced mine through the decades differently. I actually went online and would look up the average price others in my currency and skill level and style were charging at the time.
All those scams out there I keep getting on FB and IG too. The NFT ones are still circulating too.
And Ive been mucked over a few times with payment so Ive adjusted my contracts through the years as I learned.
I didn't know people do shady stuff like Canva cheap for that price.
I have a strict digital paperwork contract which includes how much up front after mocks, etc. Some clients want freebies of here revize the whole design like tons of times. So I have it broken down in a clause in my contract how that all works.
I have not done comic or manga covers for people though. Making booklets, brochures, etc Yes.
The only time my prices go crazy is logos for commercial use. Just part of the legit business stuff.
But for illustrations, etc The client owns the OCs, etc.
Id just charge for print set up friendly mode extra. Bleedlines, safety areas, if they want it set for CMYK for print. Typesetting fonts for proper clean letters.
Or else its just RGB net colours.
Illustrations then if custom logo is added or certain text. Need to be lined up for a net template takes time too. But its much cheaper than print off ready,
For me custom illustrations have to do with complexity and what other elements is used and if print or not. Mine range from $140 to about $300.
I use InDesign, Canva Pro, PS and Clip Studio Paint. Illustrator sometimes for converting from RGB to CMYK.