I assume you
can just register and set up shop there. I don't think
the overhead is too bad. You just upload some photos of your panels,
price them, set the quantity (or build to order) and you're done.
Good grief a old typewriter with a display!!!
People with too much time on their hands... am I right? :D -- in all
seriousness, it takes the legwork out of setting up your own on-line
shop, no code, no "hard work" since that's left to the site. You can
post what photos you want of what runs you do, set price-per-unit,
functionality, etc.
Here are other examples of computer-y projects.
Electronics Category: