I haven't taken a serious look at Swenson's catalog for a few years now but took a quick look to see what's worth $5000, that's more than Joshua's seedlings! I didn't see a $5000 one, which one was it? I really dislike their peony descriptions. I want to know the bloom week, how big the blooms are, are there sidebuds, etc.
It would have to be a pretty special and unique peony to be worth $1000 or more for me. That'd buy a LOT of really nice tree peonies!