Blue Mountain was my go-to favourite in the distant) past. It was never cheap, but wasn’t as expensive as it is now.
One caution for anyone unwary - there’s more than one BM. Sorry if this is too obvious, but I figure some people may not know.
“Proper” BM is the Jamaican variant. In addition, there’s Kenyan Blue Mountain. It’s BM in the sense that it’s grown from “Proper” seed stock, but as we all know, coffee is a direct product not just of seed stock but varies according to environment, which can be as finely defined as which altitude on the mountain and certainly local soil, never mind growing it in Africa not the Caribbean. It also varies year to year, even when grown in exactly the same spot as last year ’cos, y’know, weather and stuff.
Personally, I still like te Kenyan version, but not as much as the ‘original’ Jamaican. And for any purists, yeah, I know it doesn’t originate in Jamaica, bt Ethiopia which, yup, is right back in Africa. Ironic, that. So while the plant came from Ethiopia and the Kenyan one is kind-of going home, the brand that has the reputation is the Jamaican version.
All info as I understand it, but note - I am no expert. No doubt I’ll be corrected if I screwed up something. This is all from memory.