These days you've just got to shop. The last 500 I bought came along with a pistol. Before that I bought from J&G when I was in AZ-I didn't get all I wanted but I got what they had in stock. The time before that I bought off GunBroker. Locally, ammo is expensive and often out of stock. Get a list of sites to look at and call before you order; you don't want to be backordered in this market. I've got about 4 different companies I like to stick with but lately I've had to buy from others.
If you're curious about a company post a thread and ask before you order.
+1 for ammunitiontogo.com... but keep in mind that just like anywhere else right now they are pretty low on just about everything if not completely out. good luck!
Price total will depend on where the ammo is being shipped from. I get most of my surplus ammo from AIM. . If I buy from Century the shipping is cheaper but because I live in FL I have to pay 7% sales tax.
If you live near a Cabela's, they now have .50 cal plastic ammo cans with bulk ammo of many different calibers, both pistol and rifle. they charge a decent price, and the ammo cans are well-built and strong, with a waterproof seal. You might check them out.