Used items
If a product is described as ‘used’, it means the item will have been used by the previous owner. It is difficult to know how much the item has been used. It is likely that it's not been serviced or refurbished before the sale.
Ex-display items
Ex-display items have only been on view in a store so are unlikely to have been used much, if at all. However these items may have cosmetic damage such as scratches, dents, staining or rips due to being on display in busy stores.
Refurbished items
This is an item that has been used, but has then had a full check and had a repair if needed. This means the item is as close to 'new' as possible. Items maybe graded to describe how close to new they are.