I also found the "season" differences interesting. For example, a BLT standard view studio from Dec 17 - 23 is the highest cost for cash ($550 per night) but is the second lowest for DVC (13 points Sun-Thur, and 20 points Fri, Sat).
Same is true in reverse too. From July 18 through August is "value" season for WDW resorts and have the best prices. $520 for a one bedroom MK view at BLT. The same reservation for DVC is "Magic Season" so it would cost 45 points weeknight or 68 weekend.
For late summer travelers, cash ressies are comparatively cheap. Just to give an example, I could book a 6-day BLT 1 BR MK view, starting July 18, for $2983.50, with a triple A discount and tax. If codes come out later, this could down even further, maybe to $2600 or free dining or something.
The same stay would cost me 293 points -- so basically about $10 per point right now and more like $9 per point if more discounts better than
AAA come out. If you take the weekend day out of there, and just assume a Sunday to Thursday stay, the cash price is $2486.25. A corresponding stay would be 225 points, so a little better. This assumes good availability, though. Right now, it looks as though BLT is wide open for cash reservations online 11 months in advance.
The bottom line is that I'm actually a bit disappointed that cash reservation prices are not higher. For certain periods of time, there really is no advantage for someone wanting to rent points -- they could just make a cash reservation and avoid the hassle of a rental.