I'd buy it just for the art deco fireplace and the ceiling mouldings - it's gorgeous!
Location, price and overall state of the market, I'd say.
As a PP says, get the agent to describe as an upper villa (they're quite prevalent in that part of Scotland, aren't they?)
Add schools details to the listing.
Open day sounds good - could you couple it to offers with a guide price and sealed bids by a closing date? (With some sort of reserve you're not prepared to drop below.
Does it carry the whole "roof burden" and if so, what state is the roof in?