I had heard over the years that AMS Press (NY NY) had a reprint of the Laing edition of Robert Baillie's Letters and Journals (a significant, if gossipy source of information on the period of the Westminster Assembly, of which Baillie was one of the Scottish Commissioners along with Henderson, Rutherford, Gillespie and Johnson). This is the first set I've seen offered and they give it a date of 1999. I've seen more original sets offered over the years than this reprint (I bought one set; a nice example). The seller wants just under $200 without shipping, but probably more user friendly than an original as you are mindful of its age when using. That's a lot but a bit more than half what you'd pay for an original Laing edition (3 vols., 1841-42).