Hmm.... That IS a thing, and I think they have limits up to $5k. Mind you, if you try to buy anything too big, you'll get put on a list somewhere.

Also, something to keep in mind, most financial companies have a "Know Your Customer" stage where they verify you employment and income. If you are trying to buy a $20k thing, and your only income is "a stack of Visa Gift Cards", you're going to have a bad day.