for those of us you that don't have the ecco poetry books or BSP letters collections, the UK versions (unimaginatively titled) are availible here cheap. $4 or so each. I'm not affliated, just a heads up. Remaindered copies, I think.
Is the link not working? It's an American website (actually Canadian, but they do everything in US dollars, etc.). Or am I wrongly assuming you're in the US, SD?