Since I just can't ignore the cold weather anymore, I just spent an hour or so repairing and refreshing a few good-quality (cashmere), but worn, cardigan sweaters.
In addition to using my trusty sweater stone and lint brush, I actually repaired multiple holes in each sweater by DARNING! The sweater stone and lint brush took care of a bunch of pills and fuzzies, and the darning makes it possible for me to cross sweaters off my "to buy" list for winter clothing.
One sweater I bought on clearance around ten years ago for less than 50 dollars, and the other is around 2-3 years old and perhaps cost 60 bucks during a J.Crew sale.
Not bad on a cost-per-wear basis, but I also found a cashmere sweater at the salvation army this summer for maybe 12 bucks. . . I plan to darn any holes in that sweater as they appear, so hopefully I'll be getting even better value for that purchase!
Darning actually doesn't require much sewing skill. There are youtube tutorials, and all you really need to do is thread a needle. However, I did find that my reading glasses barely cut it, and I needed to sit directly under the lamp - colors other than black would be much easier to mend.