Knot a vintage head band - if you are good at sowing you'll enjoy this. Easy to create your own template that fits your style of sewing.
Collect old keys or odd ones that is of no use anymore. Paint it with enamel paint in your favourite colours. Buy some ribbon, lace or sew a string and wear it as a neclace. Can be a great gift for friends as well and stay in your budget.
Use an old broach in a fashioned way of as a hair accessory. Dig into your grandma or mothers' accessories or second hand /antique store, you just might find something like this.