Feminized seeds usually run higher per unit than regular ones, and singles are priced worst of all. Packs of three, five, and ten are the common options, with the per seed price dropping noticeably at the larger sizes. Current pricing across a range of breeders, sorted by pack size, is tracked at https://queenfeminizedseeds.com so you can spot when a bank is charging well above the norm. Buying more than you need for one run only makes sense if you store them properly.
