I've bought clothes in my targets down although actually yes I did keep some from a couple of years ago and I was thankful I did last year part way through my weight loss
As for the too big clothes, most of mine I have given to a friend who is also dieting, she started at a larger size to myself so for each size I dropped she has for each of her targets, she was so grateful, it costs a fortune going down in clothes as much as it does when you go up