The first thing I'd say is Buy American, not offshore - who knows where that Roosebeck thing is made. For that kind of money you can get a lot more instrument from someone like Harpmaker Dave Lynch, the TK instruments and several other builders. If you have an instrument built for you rather than buying off the shelf, you can have whatever VSL you want. I've played an O'Brien, they're good. And one of Dave's - very nice. David Beede's short VSL instruments are very nice too. And I've played others from other builders. Not played a Black Mountain, but have heard good things from people I trust, who have.
I'd also avoid Applecreek and First Act, again they're made in third world countries by people who don't know what a dulcimer is, and you may be buying trouble. Buy an instrument from a person who is also a player, not a company (although MacSpaden, FolkCraft, Blue Lion and Cripple Creek to name a few are quality builders).
Yes - even as a true novice you can hear the difference in quality between instruments. This is why we suggest you buy by ear, not by woodtypes, or shape, or bells & whistles.

, for dangling treats which are beyond my reach !
lol...