Ellicott City actually has 4 of the 5.56 ammo cans and about 20 boxes of 7.62 boxes. I just about fell over when I saw them. Haven't seen any ammo worth mentioning there in a long time.
Had some rewards points to spend so I dropped by Arundel Mills Bass Pro last night to see if they had some target 9mm. They had none but there was a 500 round case of Federal XM193 ($9.97) sitting on the ground behind the counter not displayed yet. Still too expensive but I just had to use the points.
They had some Independence 5.56 too but I didn't catch the exact price (~10.50 - $10.90).