As many of you know, any kind of damage to a shopkeeper makes him close shop in an instant. Accidents happen, and this can be very hard. Especially losing access to critical items such as a bag.
So here’s my suggestion, shopkeeper just gets angry and raise prices by x3 of his normal price. This will gradually drop down to his normal price range.
It gives you more options, feeling the punishment of getting really high prices, or sacrifice some turns (100-200 turns), coming back later. Either way it’s a lesson learned not to fight near the shopkeeper, but it’s at least still possible to get a critical item such as a bag.
His inventory, which I think included any gold you spent, if I recall correctly. His stuff stayed on the ground as loot too.
Now we’re talking.