What are developer's points?
These are basically 'bonus' points that have a one time use. They do not have a 'home resort' so they can only be used at the 7-month window. They cannot be banked and have a 1-year life span, meaning you have to use them within 1-year of receiving them.
In regards to UY is that when you get your points refreshed?? If we will primarily travel in December what UY should we get.
Yes and No. Actually points aren't 'refreshed'. They are already there, already allocated to each and every use year. Use year is simply the 12-month timeframe those points can be used. You make reservations using points already there. You don't have to wait for them to be 'refreshed'. For example, I have a June UY which goes Jun 1st through May 31st every year. So today I'm still in my 2007 Use Year. I could call today, make a reservation for April 2009, and use June 2009 points. (april 2009 is in my 2008 Use Year, and I could borrow 2009 points for that reservation. This is because all points are already allocated, even my June 2009 points)
As far as reservations, Use Year means nothing. Reservations are made based on booking windows from the date of your actual vacation. Every
DVC member could book December at their home resort, right now, regardless of what use year they own. Use year is really only important if you ever have to cancel a vacation. When you cancel, points are returned to your account. If you're outside your banking window then you're stuck. Generally having a use year that starts just prior to your normal vacation dates is better if you ever have to cancel because you would be within your banking window. For example, if you had a September Use Year and made a December reservation that you later cancelled, you could bank those points. But if you had a February Use Year and made a December reservation that you later cancelled, you would get them back but would be beyone your banking window.
Should we buy directly from Disney or resale?? What is the difference??
That's a personal choice. With resale you will have some additional costs (higher closing costs), may not get the same points because the previous owner may have already used some, or even borrowed some and used them, will have to wait a number of weeks before you actually get the points, are subject to ROFR meaning you could do a lot and still not be able to purchase the points. OTOH you will probably pay less $$/point. Maintenance fees are negotiable but many sellers will expect you pay maintenance fees even when technically you shouldn't. Fnally no choice in contract size. You can only purchase whatever size contracts are being offered for sale.
Buy through Disney and you will probably pay more $$/point, but smaller closing costs. Disney will pro-rate the dues based on how many months are left in the calendar year. You get the points to use immediately, and you always get 'current' points. Example, if you bought a June Use Year, you would get all 2007 June UY points now, and of course you'd still have your June 2008 allocation to use.
Is there any perk to waiting for a new resort to open and purchase there??
Again, personal choice. If home resort is important then that's a big factor. Prices will go up so if they have new perks they may be offset simply by the raising prices. Right now the dollar is weak so that may be another factor for you to consider.
Hope this helps.