Shoptimistic
To be positive that the gifts or presents you have bought for someone he or she will enjoy; to be optimistic that the purchases you will make will be well-worth the money.
My mother was so shoptimistic about the presents she had bought for my sister and I this Christmas that she didn't even bother keeping the receipts.
shoptimist
A shopper who is optimistic about his or her retail experiences.
Because Daniel is such a shoptimist, he never experiences buyer's remorse or has a bad shopping day.