From the movies?
I always (and still do) wanted a screen used prop from the *trilogy*.
I recall on Ebay there was some props from Temple that showed up some years back. I was quickly blown away on one of my bids on the items - and I stress blown away.
On a side note, I did bid on some movie props from Batman Returns (one of my favorites) and same m.o. as above. The props in question were the costumes form the Red Triangle Circus Gang. (I still kick myself for at least not winning one of these.)