Believe me, Deborah, I'm not buying *anything* until I absolutely have to. While going through some boxes I found a couple dozen bras, total.. of all various sizes.
I've also found a product that is cheap but really helps extend the length of time I can get away with wearing the bras I do have..
Secure it Strap
These work REALLY well at keeping the looser straps in place and it kind of hoists the puppies up a bit

I found them at a local outlet mall (bra) store, so I didn't have to pay any shipping.