I would buy it in memory of your long lost Aunt. She wanted to give you the money. Why not purchase what you desire, I'm sure that she would be happy for you. You are right, if you leave the money in your check book it will probably go to pay off a bill or purchase an item for someone else. You are not being selfish, you've been given the opportunity to do this for yourself. You don't need our permission, unless you are behind in the rent go for it. Enjoy it while you can....