I know I’m speaking against my own interest, but I would raise this fee to 20 euros per product. The industrial quantity of trash that people order is not normal.
It’s a tough call, because there would be some important and good ones among them… HUN webshops sell this same trash in bulk at 4x the price - that’s not cool either 
I’m stuck on idealism and I’m not taking anything for it…
Everything would depend on quality assurance; of course, that’s more expensive, but there wouldn’t be so much junk…
Just one example: Let’s say you buy a mod for a very, very high price and it doesn’t break for a very, very long time…
My wife’s very, very expensive hiking boots fell apart in the closet over one summer, even though there wasn’t much ‘summiting from base camp’ involved…
For example: In the market, only those who make durable things for good money would survive…
Well, that hasn’t been the direction for a long time now…
…you let fashion tell you who you are that’s another big problem. You have to keep cycling through the new stuff, whether the product is good or total crap