21-04-2017 12:20 PM - edited 21-04-2017 12:21 PM
eBay's policy says:
You can have more than one auction-style listing for identical items. However, only one duplicate auction-style listing without bids will appear on eBay at a time.
If buyers want all four items you can revise one listing the all four ( using the Revise Your Item link, top left of listing) change price and end the others listings early (via More Actions, far right of items on your My eBay selling page).