I use brickowl. I never got how to use brinklink and Lego dosent have all the pieces I need.
There coming from over seas since its cheaper to get them from there so it may be a little longer than a couple of days but its wroth it since I save money.
Bricklink is a lot like EBay except when you place an order (most of the time) you wait for the seller to email you their PayPal and then you pay them to complete the order. But cool! So long as you got parts and a rig in progress!