I found myself wanting options for "I have rented this on DVD but do not own it" and "I own a VHS tape or laserdisc"...as I haven't quite gotten around to replacing all of my VHS tapes with DVDs.
(And yes, I once almost bought an old laserdisc* copy of
Star Wars from a Goodwill store in Los Feliz, near Hollywood, but was too broke to afford it at the time.)
*for those that have not seen a laserdisc, think of a DVD the size of an old vinyl record 