I feel sort of torn on MK products. Some are very very good-- the microabrasion cream, the self-tanner (light moisturizer and self tanner) and the lip gloss and lipstick are lovely.
The gals that sell MK buy it and then resell at "retail" and the price is equivalent to department store pricing. Then if they aren't making it as a reseller, somehow, the inventory ends up on ebay, for example, and you can find your faves at a lower price.
There are websites devoted to complaints about working as an MK rep. But people can be very loyal to their products--my best friend uses only MK and she looks fabulous and is often in the public eye and always looked very well made up and elegant.
I have two issues: I don't like to be over charged and make up is always expensive, no matter WHO is selling it. I find the sets here on QVC are price-worthy when you get a TSV from a line you like. (I like Mally and a few LG products. Tarte is pretty good, too.)
The second issue is that they reformulate frequently not only the products, but the shapes of the refills, meaning you have to buy new compacts. I liked a particular lip gloss--a really beautiful color in a deep pink mauve with a brown overtone. It was great for day wear. They discontinued it and nothing new is similar enough to it to warrant my continuing to use the line. I get very annoyed with things I like, that are "basics" are discontinued. It was a huge seller, and they just dispensed with it. So companies that do that really don't care about their customers.