Realistically, you lose around 6 bikinis every summer after getting freakz in the hotub lending them to a friend, or from sitting on one too many 'natural slate' pool sides, which snag the sh*t out of lycra.  Point being, there's no such thing as 'too many bikinis'. And for less than $25, there's no reason not to. They weren't always this price, so get them quickly.