I just received, basically, the same offer for my Gold OV unit at the Ocean Club. I have been on the wait list to sell my unit through Marriott so that is likely why they contacted me. I probably still have a few years on the wait list, where I could net $16,000. Or I could take the current offer of a buy back from Marriott for $8300. Factoring in a few years of high maintenance fees and it's really a tough call.
From what I've seen, the buy back price is similar to the open market prices but without any hassles. My gut tells me that Marriott is buying a bunch of weeks back at these lower prices and then will resell them before selling the weeks for owners, thus increasing their profits. Not sure what I will do yet; I have a week to decide.