These two are probably the rarest props I had (as in "
had" because I ate them). I believe they were the only such cookies to ever exist up until that point in time.

(I've got the molds to make more)
Raiders of the Lost Ark STAFF OF RA COOKIES
(Cookie molds: Click to enlarge):
Speaking of the
Staff of Ra. I have the MK Bronze medallion which appears to be made with a parent mold of the Acme medallion. I've personally never seen displayed before plus this particular one was drilled at
Elstree Studios according to the previous owner as their wife's uncle worked there and drilled it for them. It uses a mount that looks identical to my Indi Magnoli mount so I imagine they bought the staff top from him and had the MK medallion drilled to fit it.
MK (Michael Key) Medallion by itself
Mounted on Staff (click to enlarge)
I think my
Horn of Dagoth (Eldar73/Sarednab version) is pretty rare (very few made?). Other than the build thread, I've only seen one other shown on the Internet (
MR. THX's site). It was, of course, the key treasure/relic needed to resurrect the Dreaming god in
Conan The Destroyer.
Then there's some
lighters I have that are on the rarer side of things.
The
Zundar 1000 model lighter was used in
Inglourious Basterds. This particular Zundar 1000 is particularly rare being from the infamous 1936 Olympics hosted in pre-WWII Nazi Germany.
There are still a few of these Ronson Touch Tip with clock lighters floating around out there (maybe 10 a year show up on eBay) that match the lighter from
The Maltese Falcon on Sam Spade's desk, but very few are still in near mint condition. I think this on sat on a shelf almost unused for a very long time.
Zippos aren't rare, but I've not seen very many Wallace Corp engraved/painted versions out there. I don't think it was used in the movie, but I thought it was cool so I put it on display anyway.
One of a kind Ronson Touch Tip octet lighter (Black octets were used in a few old movies from the '40s, but it's the historical value of this one that makes it rare/unique) that belonged to Walter K. Whigham (There's a world record breaking steam locomotive named after him in Britain, which is how most people from the UK know the name...if they know it). This is his wedding lighter gift from the Central Electric Board on June 1st, 1943 engraved with a custom silver plate on the bottom and around the base plate top area with signatures, two of which represented employees during WWII that went on to be in British Parliament. The lighter shows no signs of ever being used (mint condition). I didn't have to bid super high to get it because apparently people have this thing about not wanting items with monograms on them, even if they're MINT and have something historical about them, oddly enough. I thought it was pretty cool to have known history tied to it.
In a similar fashion, Table Lighters from 1930s and 1940s were commonly used in period films like this Dunhill Rollalite Table model. This one is one-of-a-kind in that it actually belonged to Ace pilot Dean "Diz" Laird who was the only WWII Ace to fly in both the German and Japanese arenas. He later retired as a Commander in Miramar "Top Gun" school. He flew a WWII fighter two years ago at age 97. This was a gift from his fellow officers in the late 1940s. It's neat to own an item with something from known history tied to it. The owner had no clue it belonged to someone semi-famous from WWII and I got it for less than half what one should go with nothing engraved on it.