Fun story, I was in a group where we played D&D 3.5. We found some magic loot and wanted it identified. The DM said it would cost like 1,200 GP for five magic items. We as players said it costs 100 GP per spell so it should be 500. The DM said that's the wholesale cost, but there was only one wizard in town and there was a big mark-up. The party wizard player said "fine, I'll buy a scroll of identify, put it in my spellbook, and identify the items." The DM was pissed and said the scroll would cost way above the normal price, but it was less than doing all five items so we paid for it. This exchange took up most of a three hour session as we just wanted to know what we had and the DM thought we were trying to pull something.
That DM moves away, the group stays together, but we switch to Pathfinder. The next time there are magic items, someone makes a spellcraft check, and the DM says, "It's a +1 sword," and we move on with the damn game. Beautiful new rule there.