I beat stickermule... not by much in the higher quantities. usually 3" x 3" Stickers I sell for 50 cents a piece in under 100 qty - In 100-1000 I'm at 25 cents... Stickermule is at about 32 cents for 2000 + - $1 for 100 plus.
Online I sell for more - Thats my local, you must come pickup, and provide print ready artwork price.
I used to be way cheaper to compete with stickermule / get business... But it just isnt worth the time. By the time you add printing + die cutting + packaging, its not worth it to do it at these prices.... Not when you could be doing something else that has a much, much higher profit ratio.
So I do it for my current customers or people who ask, I dont advertise it anymore.