Best way to judge how much you may be offered for items, is to check out the price reached from other sellers, selling the same item.
Put the full description in to the Search bar top of your eBay homepage, click on Search far right.
Then, down the left sidebar click on Sold, this will bring up those items which sold , and the price they reached.
Look at the items then for sale, selling yours even for a few pence less will make it more attractive to potential buyers.
Happy Selling ! 😊
@col_9185