Ratty,
You can get very excellent Jamaican coffee at both the Blue Mountain Coffee Shop and Cafe Goa, but neither are "certified" Jamaica Blue Mountain like the "Jablum" brand you mentioned. Jamaica Blue Mountain® Coffee is a globally protected certification mark and only coffee certified by the Coffee Industry Board of Jamaica can be labelled as such. This helps explain the price difference. But to my taste and cost, i prefer the hand roasted coffee available in Negril, but none can technically be called "Jamaica Blue Mountain."
CPJ (Caribbean Producers Jamaica) sells a brand called "Greenwich Estates Select" 100% Jamaican Blue Mountain to the local stores for around $35 a pound (when you can find it).
