I'm going to ask for a lower price
Why do you want to ask for a lower price?
I want to get the item cheaper than it's original price
Generally in places where haggling is not expected, it's rude to do so. An odd rule, but rude nonetheless.
Don't worry I'll be more discreet with my haggling.
If you really feel like you can get a better price by doing that then fine. Sometimes item prices can go down if the owner was thinking about putting it on sale. You better find some other store where you can get it for cheaper.