Underpricing and Overpricing the same item.

 If you don't know the value of an item under price it and then overprice it.

https://www.facebook.com/marketplace/item/527022595639040/?ref=messenger_share

 This item was listed on Facebook Marketplace for $50. which would be a good price. Then it jumped to $1000. which is a stretch for a non dealer in formica tables. Why who knows ? 

 But before you sell anything research similar items for sale. An item is only worth what someone will currently pay for it .