I have a party of 4th level characters.  One of them has a curse, not a major curse, and wants to pay for the remove curse spell.  What do you think a 3rd level spell casting should cost?  They're on a big mission right now, and can't take the time for a side quest.  Thanks

However much gold they have, minus one.

If you use the “single use magic item” rules as a guide, anywhere between 250gp-2,500gp.

According to the Sane Magic Item Prices list, a 3rd-level spell scroll should be about 200GP? Maybe double that, or just add 50%, if they need to pay someone to do the casting?

Yeah, 200-400 seems reasonable. But if someone wants to price gouge....