Just booked 5 nights in a 1-BR villa at the Westin Lagunamar, Cancun, mid-February next year. Total cost: 58,000 Starpoints. That works out to 14,500 SPG per night, plus the fifth night free, thus averaging out to 11,600 SPG/night. For some reason -- and I'm not complaining -- they must consider February "low season." My SPG account confirms that assumption, as the description of the point withdrawal says, "CAT 5-SPCLTY SELECT-5NT-LOW."
Get 'em while they're hot! (Before it goes up in category on Tuesday.)