For things like sewing equipment or knives, what you describe is true, but for things like custom keyboards, it is not. For instance, I purchased an Ergodox on

For things like sewing equipment or knives, what you describe is true, but for things like custom keyboards, it is not. For instance, I purchased an Ergodox on Massdrop for less than $300 at a time where sourcing the pieces yourself would have cost well over $1000.