As it seems like there are some members new to the part buying aspect of Bricklink, I thought I'd share some information on programs that can make it easier. Bricklink is a great thing to have, but using it at first feels like a time machine to 15 years ago and shows you just how bad online shopping can be on an outdated website design. That said, two programs that can relieve some of the pain are Brickstore and Brickficiency.
Brickstore essentially lets you manage the Bricklink database in a more powerful and easier to use way. Imagine the Bricklink parts/sets catalog combined with Excel. I primarily use it to check prices and inventory levels of parts and sets, to create wanted lists for missing parts I need or sets I'm trying to build from scratch, and to verify inventory of a Bricklink order or a used set I bought. It has the ability to import set inventories, import Bricklink orders, export Bricklink wanted lists, etc which make it much faster to use than the Bricklink website.
Brickficiency is a program that takes a Bricklink wanted list or Brickstore .bsx file and scans Bricklink to find the cheapest combination of 2-5 stores to purchase the parts from. This makes it very easy to find where to purchase a list of parts from, rather than having to manually and tediously use the store list on the Bricklink Wanted list page.
Hopefully this is helpful to anyone who has not heard of these programs, and if you already have, you probably know how useful they are . If it would be helpful I can write some short tips and guides on using these programs to accomplish certain tasks such as verifying completeness of a used set, identifying a used set based on a few bricks, Bricklinking a complete set from scratch, etc, or even just basic Bricklink tips and info, just let me know