Do people sometimes do group buys to save on shipping? I've got an item or two that I might want from Liveaquaria.com or Saltwaterfish.com but not enough to get free shipping. I hope I'm not violating some kind of policy here. I read the Group Buy sticky and this seems to be ok. I'm a strong supporter of the LFSs in Rochester and have made purchases there but there are a couple items that aren't available there that I'm looking to acquire.