I just rented out my DVC points through this company:
www.dvcrentalstore.com
There is a points calculator on the site, so you can figure out how many points you'd need.
Low season 1BR pool view week is around 300ish points, so $5400. Studios are cheaper, 2 or 3 BR units pricier. Better seasons are more expensive, better views are more expensive. Less days are cheaper, you don't need to book a full week.
You could try to trade your MVC privately through the Mouseowners Rent/Trade forum. But fair warning, DVC is an expensive timeshare and people who own it tend to think its the ABSOULTE BEST EVER and they don't always place too much value on anything nonDVC, so I wouldn't get my hopes too terribly high for a private trade. Most DVC people seem to be east coast, so you might get lucky if you own a Marriott appealing to east coast folks- ie caribbean.