Expect minimum hassle, maximum return
At a typical brick-and-mortar consignment shop, you would expect to receive only 50% - 60% of your item's sale price. Should your item not sell, the shopkeeper may mark it down, further reducing your proceeds. And their customer base is limited to those who enter their store. It’s not unusual for consignment stores to have excess inventory and to hold your item(s) for many months.
When you sell online, via eBay, Craig’s List, or another venue, individuals, collectors, gallery owners, and/or businesses routinely searching for exactly what you have see your items around the clock all over the world.
When you sell online, you sell quickly and are paid quickly.