Second life lexacon 1

Dollarbie noun an item that sells for 1L$. 1L$ is often synonymous with free even though it is not really zero lindens. The practice started in the early years of SL when people wanted to track how popular something that wanted to give away was. If you make an item free to copy you cant see how many people take it. Even to this day you can have SL not show you 0L$ transactions.

Also one of the web shopping sites Onrez (formerly SLboutique) or Xstreet (formerly SL Exchange) had a policy in the past that you could not send a 0L$ item to another person. Merchants that wanted to make gifting there free items easy had to ether list 2 items. 1 at 0L$ and 1 at 1L$. Many of them over time just removed the 0L$ one to make item management easy. I believe this was done at that time to stop Item spamming (when you just send a bunch of stuff to a person).