Hi Bea -
We actually just fixed a bug this morning that for some reason prevented prices on digital listings only from being able to be updated. Again, this has been fixed, so everything should now be fine.
However, if your shop has been moved to the new Etsy Shop Manager, then Prices, along with Variations, Quantities, and SKUs will not be able to be edited until we launch the update that's needed to support these components within Vela. I'll be sure to keep everyone updated, but at this point we're on track to launch in 2-3 weeks.