Wal Mart has Winchester White Box ammo and Sportsman's warehouse has some good American Eagle, both for less than $10.00 a box.
I would suggest looking into a basic reloading set up like a Lee 1000 with 38/387 dies, 158 grn lead for about $19.00 for 500 bullets, 500 primers about $8.00, 1 pound of powder about $16.00, 500 rounds of 1 fired brass about $10.00....Heck you get serious and I have a extra bag of brass I will send, just pay the shipping.
It may be a $100.00 for the Lee 1000 or so but once you get set up and figure out you can crank out a couple hundred rounds for what you could have bought 50 for it is worth it.
Oh, there is a down side to reloading....Once you get it all dailed in and the costs figured out you will find out you are spending a lot more time at the range shooting and picking up brass so you can do it all again the next week.
Karsten