Hello I posted about this plant a while ago and now have a picture. Does anyone know its value or rarity? The specific clone is Agave parryi subsp. parryi var truncata 'JC Raulson'
I have no idea about the rarity or value of your plant. I did find one online (see links below-one at the JC Raulston Arboretum...note spelling with a 't', if you want to search).
The plant in the pic at the one site shows it sold for $15. It also has some info about the plants' origination below the photo.
Here is a link that might be useful: 'JC Raulston' Agave
It certainly is a beauty.
I wouldn't call it rare since High country garden has been selling it for years it for around $7 - $8. And Plant delights ($16). They are out right now. It is pretty. My local nursery has sold them also on and off.