Ok so not the beg and steal thing, but the borrow one is a good idea. I am speaking of maternity clothes. They are kind of pricey for things you wear for such a short period of time. Chances are, unless it’s your first kid, you are surrounded by other mothers. Hopefully some of them have good fashion sense. And a generous spirit.
Now, when I get maternity clothes, I take a pen and write my initials in the tags. That way when a fellow mommy who is my size announces a pregnancy, I offer up my clothes. When I am pregnant, I start asking around and people usually return the favor.
I think this works really well for things your kids need that aren’t worn that often too. For instance, if your child is trying out a sport that requires a lot of equipment purchases, ask around before shelling out a bunch of money. Same thing for special occasion dresses, a swim suit for a vacation during the winter, snow suits, a costume, etc.
I think it never hurts to ask. The worst you will hear is no. Then return the favor whenever you can. For more frugal wisdom, check out Biblical Womanhood.