Quote from Pension_Admin:
Here is another tip:
Price for items in the convenient store is not really set in stone. You can always negotiate to get a better deal.
I negotiated the price for a bottle of coke from $2.50 to $2.00, and both me and the convenient store owner feel happier because I got what I wanted at a discount (not much, but it's good enough for an impulse purchase), and the convenient store owner made a sale, thinking that he was able to persuade a guy, who was thinking of just getting a $1 can of coke, to buy a $2.00 bottle!
PA