For someone obsessed with the SR-71 Blackbird, here are some great gift ideas:

SR-71 Model Kit: A high-quality scale model kit of the SR-71 Blackbird for them to build and display.

SR-71 Book: A detailed book about the SR-71, such as "SR-71: The Complete Illustrated History of the Blackbird, The World's Highest, Fastest Plane" by Richard H. Graham.

Flight Manual: A reprinted or replica SR-71 flight manual for an in-depth look at the technical details of the aircraft.

SR-71 Artwork: A framed print or poster of the SR-71 in flight, or artwork depicting the aircraft.

SR-71 T-shirt or Apparel: Clothing featuring the SR-71, such as t-shirts, hoodies, or hats.

SR-71 Documentary or DVD: A documentary or DVD about the history and missions of the SR-71 Blackbird.

SR-71 Experience Tour: Tickets to an aviation museum that has an SR-71 on display, such as the Smithsonian National Air and Space Museum or the Museum of Flight.

Custom SR-71 License Plate: A custom license plate or keychain with the SR-71 design.

SR-71 Memorabilia: Collectibles like patches, pins, or coins featuring the SR-71.

Personalized SR-71 Engraving: A custom engraving of the SR-71 on a piece of metal or glass, perhaps with a personal message.

These gifts would be perfect for an SR-71 enthusiast and show appreciation for their passion for this iconic aircraft.