The amount of money that a bag of aluminum cans would be worth would depend on the size of the bag and whether the cans were smashed or not.
Soda and Beer Cans here for scrap are being bough for 30 cents per lb currently so if the bag of cans weighs 4 lbs then it would be $1.00
If the bag of cans is 8 lbs then it would be $2.00 so it's not much but is something however if you have to take just one bag of aluminum cans to the scrap yard it's not worth the cost in gasoline because it will cost you more in gasoline than you would get from the aluminum cans.
You should save up enough bags of aluminum cans and smash the cans so they take up less space and you can get more lbs of aluminum cans in each bag.
I save up at least a pickup truck load and then take them in and I usually get $40.00 to $70.00 depending on the price of aluminum cans for scrap metal.