ROFR is Right Of First Refusal. ALL resales have to be submitted to Disney before a resale buyer can actually buy.
If the price is not high enough, or if the buyer isn't paying closing closts, or any other things, Disney can snatch the resale out from under you.
You could lose 1-2 months from the initial offer to Disney exercising ROFR or not. Disney has 30 days to review a resale. Sometimes they review fast, but lately, it seems they are taking the full 30 days. Most likely because they are SO busy with SSR sales.
So if you make an offer on a resale, you need to make sure you offer a price that is above the floor of ROFR. Most WDW-DVC resort resales have not been taken by Disney if the prices are $71 or higher. Some $70 prices have been seen, but those could have been stressed contracts (ie no current points, or a lot of borrowing points).
Most people here, me included, will tell you to buy where you want to stay. If BWV is your yen, contact a reseller, let them know the size contract you are looking for and have them contact you when they get one that meets your needs. You can also surf the resellers websites too, but a lot of times the good contracts don't even make the websites if the agents have clients waiting for just the right contract.