Amy my deepest sympathy on your loss. First if you are going to display the models in a museum it should be a larger museum. The model car museum is small which limits the number of people that would be able to enjoy his models. Second I would put them on loan to the museum rather than donating. You need to check the details not sure how that works. Third if you are selling be sure to get a reputable appraiser. Again my deepest condolences. My dad passed 15 years ago and my mom passed 5 years ago and I can appreciate your.loss. Harry was a big part of this board and is deeply missed.