The ways I can convince someone to buy the ugliest sweater in the world is buy marketing the product, making it seem like it's the best sweater in the world. I'd target my market to maybe elders or confused teenagers. I'd claim it's for unique people who have unique style. Also, I'd put maybe a small christmas gift to go along with it, it may give them an inquisitive insight into what the gift may be and they'll buy the sweater to figure it out. If I've been rejected? Thats A-OK, onto the next one, and I'll bug them out of their minds and then they'll end up buying the ugliest sweater for christmas.