It might be good to highlight how you're aware of these issues and what you're doing to ensure high fidelity reproductions.
Educate your would-be customers to be more discerning!
VSUAL solves that problem for artists by giving them a prints-only marketplace focussed on quality. Every print is made with archival ink on Hahnemühle Photo Rag, Canson Baryta, or high quality Epson Semi Gloss paper. It also enables artists to sell a large selection of prints without keeping any inventory on hand: we handle printing, framing, and fulfillment.
For buyers, VSUAL solves the problem of size: all too often, you can find a print the size you want, or of the art you want, but you can't find the right art at the right size. With VSUAL, it's easy for artists to list their entire inventory at multiple sizes, making shopping easy for buyers.
We're still just getting started—we have /some/ traction with artists, but haven't quite cracked the code on marketing to buyers. What do you think?