go window-shopping
be a compulsive shopper
go on a shopping spree
go over your credit limit
bid on an item
make an impulsive buy
have a buyer's remorse
Be a bargain hunter
be unable to control your need to buy things
buy something suddenly without having planned to
look at goods in stores without buying any
spend lots of money shopping for pleasure
charge more to your credit card than the allowed amount
have regrets after making an unwise purchase
be a person who looks for low-priced products
offer money tu buy an item at an auction