How often do you have "buyer's remorse?"

You know how it is: You see something that you fall head over heels in love with, you slap down the money for the honor of taking it with you, you get it home and the thoughts start nagging.

"I shouldn't have bought this."

"I can't really afford this."

"I should have used that money to buy groceries/pay the water bill/put gas in the car/whatever."

"Do I REALLY need this?"

Those thoughts are followed by "Maybe I should return this and get my money back."

You scramble to make sure you still have the receipt, just in case. . .

How often does this happen to you?

Do you listen to the nagging doubts urging you to return your prize?

What items have you bought that caused you to have buyer's remorse?