I have noticed many advertisers quoting "I reserve the right to end this auction as i have advertised this item elsewhere" Is this possible and if so, how do i end an item early ?
Yes, it's possible as long as there are either no bids on the item, or more than 12 hours until it ends. There should be an option to end the listing in the dropdown menu next to the item in My eBay - if there are bids you will need to cancel those first. If you have the item number and any member IDs of bidders you can use the following links to:
Just be aware that it is against ebay policy if the buyer was made aware of the van from eBay. (Canceling a listing to sell to a buyer who became aware of the item through eBay)