Gifts ideas for unbelievably difficult person to buy for?

I am looking to buy a gift for my sister. It is for whatever occasion, I just want ideas. She is so difficult to buy for. She is one of those people that if they want/need something, she will get it herself. Or she will tell me she wants something but before I can get it she already bought it cuz she didn't want to wait lol she is just like that. She is unique, I don't know how to describe her style other then, she likes unique things and cherishes having odd things that most people don't even know of. She always finds the coolest things and I think it would be awesome to find her something that shes is like "wowww that is the coolest thing!" I would love to see her say that. She also thinks she was born in the wrong era lol she thinks she was suppose to be born in the 40s. She hates technology and she just loves how simple it would have been in the 40s. We visited Homestead Hallow in Arab Alabama and she loved the house there that was built in the 1800s. She is simple but so complex. Do you get why I need help haha. Please help me find a gift! thank you so much in advance!