Right now the only resort they are selling is Saratoga Springs.
The price per point is $89/point.
A $5/point discount is given if you take your annual points now --but you use them when the building you bought into opens. Right now that would be early July.
A $10/point discount is given if you forfeit all your 2004 points.
Please note that once Satatoga Springs opens (May?) these discounts will probably disappear and the price per point will increase.
Also keep in mind that the deed for Saratoga Springs expires in 2054, not 2042 like the other resorts.