I visited quite a few single malt specialists while I was in town. I don't know what made me think a malt whiskey would be any cheaper in Scotland than it is in London. It is probably cheaper in New Zealand!
Anyway, I like a Springbank, but a 21-year-old will break the bank. One seller had a barrel of Campbeltown malt and sold half bottles of cask-strength from the barrel. 55%, so you had to add water to taste after you tired of smelling it. Beautiful.