* Where you can rez on instead of going to a sandbox
* Land that does have people renting it, but they left it on open rez on accident..

Would this be worth it for anyone? Or don't waste my time?

I think it would be a waste of time because when the renter finds out that someone is rezzing on the land they would most likely turn off rez.

On the other hand if the renter was flat stupid and you could get away with it, it would be a good deal free land.