Sorry for your loss. Other than the three items you sold in October 2021 I see you haven't sold for quite a while. You are going to need to be careful about listing expensive jewelry given the number of fraudulent buyers lurking on the internet. It might be wise to start by listing lower priced items and see how it goes at first.
You also need to keep detailed records when administering an estate as well. Itemize everything you do in a ledger if there are other heirs who may have the right to ask questions.
I had several items appraised at local jewelry stores before listing them. Sold some here and other pieces went to the jeweler.
In either case you will need records for backup once you receive your 1099K at the end of the year. My jeweler even took my info down when I sold him a few items and a photo of my drivers' license in the same photo as the group of items I sold.
