One of Ryan’s eight rules for freebie hunting in Second Life is to watch carefully for free group join periods, and take advantage of them!
For example, I just found out that today is the last day to join the 7 Deadly s[K]ins group for free. Normally, the group join fee is a steep L$1,000, so this is an opportunity you should not pass up!
In addition to monthly group gifts, 7 Deadly s[K]ins has an absolutely amazing Christmas calendar of free group gifts, every day from Dec. 1st to Dec. 31st! You must be a group member to get all the freebies, though.
7 Deadly s[K]ins is one of those irritating store names that you cannot seem to do a keyword search for using the Search feature of your SL client software, though, so the best way to join the group is to teleport to the in-world store, and click on this Group Join button on the sign behind the front counter at the entrance:
Another group that is offering a time-limited free group join period during this Black Friday sales period is CAROL G., an avatar tattoo store. (You have until Nov. 30th to join that particular group.)