I thought, as one of their locations is very close to me, that it would be a wiser option to pick up heads and hardware from the flea market location. I got myself some replacement heads for my vivi and stardusts but paid $4 a pop for them. I thought that was a bit extreme. The juice is same price as online though so that isn't bad.
If you pre-order online and request pick-up at a flea market location then you only pay the online price.