So the OP quoted the book wrong? That's fine, and BTW typically you by a pair of shoes not just one because typically shoes come in pairs, and the cost is for the pair. But hey other posters have stated the chart does not specify. Guess it's all in how you read the book.Book says duelling pistol for 750, so it's a duelling pistol for 750. Typically sold in pairs so 1,500 for the both. But I would throw in a nice case with those for free.
As others have said, it's actually a good weapon and fluff-wise, it's aimed at nobility near the core. 750 is nothing.
The chart says pistol, singular. Description says "typically sold as a matched pair". Nothing about "always sold" or "the cost in the chart is for two".
All that happened here, is that the developers did not want to mess up their standard layout for a chart that always detailed singular weapons in every other case, and also did not want to unnecessarily restrict purchase options. They could either introduce a one off special case into their chart formatting and add even more text in the description stating that even though the chart lists two items you can actually halve what it says in the chart and buy one singly. Or they could just add a line in the description saying "typically" they're sold as matched pairs.
The latter is simpler both in length and layout. If they'd chosen otherwise we'd now be having even more threads with people asking if you could buy them singly and asking if "Pistols(2)" meant that the damage listed was for both of them and if as well as cost you should halve damage and all that other stuff.
Book says pistol. Description says "typically" sold as a matched pair. Not sure what there is to argue about.
As to "you don't just buy a single shoe". Well the description doesn't say "always" sold in matched pairs. Shoes are not pistols.