Paying with gift cards is fine! Lots of people do that. Maybe not entirely with gift cards (lots of signing!) but yeah, that’s not uncommon.we did close to it. we bought similarly expensive item with gift cards ($100) bc it was discounted to purchase the gift cards - frequent promotion in our major retail grocery stores.
the customer service representatives nodded in agreement that they also did the same things - bought the discounted gift cards to pay things e.g. bills, shopping, etc.