Mail order- hard to get selections

Anyone use any mail order or on-line ordering for hard to get plant types?

 

I never have but then again there are a bazillion nurseries in this part of the country. I can tell you that not far from me is a place called Collectors Nursery and they ONLY sell by appointment, online or during the 1 open house they have per month and deal in only rare, collectible or hard to find plants.