If they want to work slave wages for their quality of work then it's on them. You can't ask someone to not make money.
You might as well ask gold farmers to stop undercutting in rs to preserve a better rate but it won't work.
Go see the db for how many of the set b/s per day and the components, then you can see how slowly you'd be profiting or not 15k is a nice flip if it can sell in bulk.. Or see if the alch price is higher than 5k .