You will see The Colonies 4 BR LOs every once in a while in the free timeshare forum here on TUG. There are also generally a few that go through Timeshare Nation throughout the year. You can look for them here:
www.timesharenation.com
There are a few things to bear in mind - always check the week of the year and that it's a fixed week that you pick up. In II, the Travel Demand Index for Williamsburg is TDI 29 and weeks 23-34 are at 150 then, but the drop off is quite sharp for the rest of the year. I own a week 31 at The Colonies and have down fairly well trading in II with it.
As far as SVV goes, I haven't seen many of the mandatory SVV phases being given away free on eBay; those generally attract some bidders because of the usability with Vistana. I did manage to pick up a free EOYO SVV Key West 2 BR prime season/platinum through Timeshare Nation the other day, but when those show up they go very quickly. I've been using my SVV weeks in ThirdHome rather than II, when not using the StarOptions for other Vistana reservations, but will likely switch to using them in II since ThirdHome changed the number of Keys I get for a deposit from there.