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