kokim, I'm going to give you a little bit of advice, gained from experience.
Firstly, depending on where you live, most CT and WM stores do not carry reloading supplies.
Secondly, the mail order places are not cheaper to purchase from than your local gun shop. By the time you pay the taxes and shipping from the online store, the prices at your local shop are not only comparable but sometimes cheaper by the time you get them home.
Sadly, many gun shop owners carry a very meagre supply of components. They would rather sell loaded ammunition as there is a better mark up for them. Also, many of those same gun shop owners know little or nothing about reloading.
Some of the best and cheapest suppliers are in the banner advertizers on the header board.
Tradex, Budget Shooter Supply, P&D Enerprises, SFRC and a couple of others.
Do some research on your own. All you will get from most here are opinions about their favorite stores.
Take an hour and browse the advertizers on the headers and what they offer. It will be an hour well spent. Then, figure out the full costs, including taxes and shipping and compare it with your local gun shop. You will be surprised at how close and even sometimes cheaper they are. Especially if you purchase in bulk.
If your budget only permits you to to purchase one box of bullets, primers, cases, powder at a time, you are way better off to purchase locally.