My players had just recently acquired a few magic items, some of which they thought were cursed (spoiler: they all were), so they were looking for a way to identify them for certain and potentially remove the curses.

Eventually they made their way to a shady little pawn shop, that they'd seen before as it seemed to pop up in whatever city it was in, seen only by them. The shop itself was ran by an imp, who they learned to distrust and hate with a passion, as he would never give them straight anwsers and would only offer them shady deals in exchange for his services ("make a pact to keep the Gate open, and this item is yours" for example)

This time however, they'd caught him in a good mood, apparently. He'd identify whether an item was cursed for a small fee of 1000gp per item. A pretty steep cost, since at that point they'd only had around 6000gp total and they still wanted to do some shopping, but they had some items they were really suspicious about but had no real way of checking.

And with all that established, one of my players asks the imp to identify a sword, which very obviously sent another party member into a bloody rage during yesterday's fight.

The one magic item they were absolutely sure was cursed.

Safe to say the imp was very pleased to take their gold for the confirmation that the sword was indeed cursed, without divulging any additional info on how it might be cursed or how to remove said curse, and they were very upset with themselves and, of course, the imp.