Not any cheaper than on the site. Buy directly from DXRacer. They don't charge tax or shipping, and you don't have to wait. I used a coupon code (REDDIT) for 5% off and paid less buying direct.
Not sure how mass drop gets off charging 30$ for shipping. DXRacer does not charge shipping, so mass drop is probably just trying to make money off people.
RCouchMassdrop is a distribution company. Most of the money they make is probably from the shipping charges. DXRacer makes money from the product itself and if they don't charge for shipping it's likely because they have a big enough markup in the product that they don't need to.
Not sure how mass drop gets off charging 30$ for shipping. DXRacer does not charge shipping, so mass drop is probably just trying to make money off people.