Would not have occured to me either to take curtains down when I moved out, or to charge for them. Anymore than I would have taken or charged for fitted carpets. Curtains are made for individual windows these days and are, to me, part of fixtures and fittings.
I do remember in the long distant past that this was not the case, but all my curtains were left in place, as were those in the flat . I have now changed out the ones in the Living room and my bedroom here.
Again, left behind in the house was the dishwasher, washing machine and tumble dryer. Did bring my few months old fridge and upright freezer with (this was too big for the flat and I did sell this down here). Obviously fitted in ovens were left there (having had them cleaned by professional a few weeks before I moved out).
These days there is the long, many paged Fixtures and Fittings List we have to complete., so we can know, well in advance what is being left. In the flat they had put against the dishwasher, and washing machine - 'open to negotiations'. I knew I would be wishing to replace these elderly machines pretty quickly, but thought it might be useful to have them in situ for first few weeks, so offered just a hundred pounds for them,. Do not think this was noticed by much solicitor and passed on, as there was no comment on this. In the end I was glad they had not been left as I would only, then, have had to pay for them to taken out when I got my new ones.
It is like light fittings, in past years people would take these down, sometimes just leaving bare wires - not allowed now. I did take with me the nearly new shades I had in my bedroom and in hall and landing. These have been re-used in the flat -but actual proper fittings obviously got left.
Do hope all of you on here will be making your moves very soon and successfully.