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She got serious about couponing and decided to go extreme. we say extreme, how extreme are you? >> i have a costco in my bedroom. here it is. >> reporter: wow, you are stocked with goods to go here. >> reporter: the coupon queen, as she calls herself, is stocked with brand name products. a lot was free or less than $1. is that really possible? >> at the end have to look at it. >> reporter: we went shopping with her to put her to the test. >> 49 cents afterwards. coupon $1 off five. make it $2 fo...