Unless buying in bulk, with free shipping, then I concur with the recommendations for the Federal aluminum and Perfecta, from Walmart. These are both consistent, clean, safe, and accurate, and are just a shade over $10 after tax, which is nearly unbeatable.
Also, though it always gets a lot of traction on the forums (way too much IMO), the idea that one brand or weight with change the impact area, is a non-concern.
Obviously, a high level of precision is critical for competetive shooters, but for the vast majority only shooting for fun and/or practice from 7-15 yards, any difference will be neglible and unimportant. In fact, even in a life & death self defense scenario, it won't make any discernable difference, since those
"one in the heart,two in the head" triple-taps are just TV-inspired fantasy.

Shoot whatever is available that is cheap, and won't blow up in your gun.