I bought mine that way a couple of months ago - delivered very quickly and safely and very pleased with it.
The Music Room is an excellent shop - they also sell by internet and catalogue - but no dulcimers in it. When it comes to looking for tune books for dulcimer, though, The Music Room has a much wider selection than Hobgoblin.
I've looked in to the Nonesuch website quite a few times, but not joined yet. Lots of helpful information there - for mountain and hammered dulcimers. Also a source for second-hand instruments (I didn't know about them when I bought mine new !) They are a kind of "mini UK Mudcat" for dulcimer players: hold monthly regional get-togethers and one big week-long event every year. It looks like a good organisation.