Look at the completed auctions (advanced search) on ebay.
dji Mavic air 2 combo | eBay
Especially where it has been an actual auction ( the bid count is shown ) and not a BIN or make an offer.
Weekend ends generally get a higher price, especially in the evening.
Good photos with the items neatly and clearly displayed help, good accurate descriptions do too. (REMOVE your CAA ID before you take photographs.)
If the usage is low, show the mileage etc. ( screen capture of the "me" or "profile" section at the front of the App ) in the advert's photos or quote them in the adverts text. Be prepared to answer questions such as how many charges on each battery and why your are selling.
For your own protection, photgraphically record all serial numbers from the drone, controller and each battery etc. Screen capture the "about" and "battery info pages", keep ALL the logs they contain serial numbers as well as whatever else.
There are chancers out there who will swap defective items for yours and try to get away with returning the defective items to you as yours, the records mentioned might serve you well if you hwppen to sell to such a person.