I have the six vol Scots Minst. and four vol. Brit. Minst. editions, both picked up in Edinburgh bookshops (not necessarily antiquarian shops either). From how seldom I make the tour round the book shops of Aulsd Reekie these days, and how often I encounter copies (though not usually complete sets), I'd say there is still a decent likelihood of obtaining full sets of both here.

I agree with Jack and Jim that there are some very interesting commentaries and early printings of several Scots songs, such as Gin I Were a Baron's Heir, with good notes.

Does anyone know which bindings are from which editions? I have a full set of blue leather bound Scots Minst. and red leather bound Brit. Minst. I generally only see the khaki-green coloured Scots volumes in shops though.