Here is another very good source for decants that a real perfume devotee friend prefers to The Perfume Court, which I have also been very satisfied with.
http://surrendertochance.com/
I have also been very satisfied with The Fragrance Shop, which makes excellent replications of the originals of many classics that have become mere shadows of themselves due to reformulation rules in Europe. The quality is excellent, as is the service.
http://thefragranceshop.com/