My parents and grandparents have all passed away and we already got to that place in the 'attic'...lots of wonderful memories captured on old films. One of my brothers has spent the past year transferring all of them onto DVD and we just got more from the only surviving Aunt. Other than that, we all have furniture and other mementos from family that will be passed on and on and on. One brother and I inherited Grandma's green thumb and have many plants and flowers that started years ago. I have one plant that originated 50+ years ago.
Something I could sell for a lot of money? LOL Seriously though, I love history and stuff with a feel of history so it's really hard to narrow it down.