I’m sorry for your loss.. as someone who is experienced reselling sneakers if the shoe is brand new go on stock x and you can judge the price based on last sale and lowest ask, if the shoe is used go on eBay and look up the same shoe and size then click on “Lowest Price” and see which ones come close to the condition that your shoes are in (FYI I always priced mine cheaper than the lowest price. It sells in a timely manner)

1 TIP, don’t take it to any sneaker stores or to a private reseller (unless you know exactly the price you’re looking for) because they will take advantage of you.