Editing eBay Listings
Go to Extensions > OpenBay Pro > Manage Items
Find the eBay listing you want to edit and click the green eBay icon. Here you can edit the price and if you have variations make the item inactive if you do not want that variation being listed on eBay. Once you have made the changes you can then save the listing.
If you are wanting to edit the stock levels of the products which are listed go to Catalog > Products and edit the product. Edit the items stock under the stock control tab and click save. This will update your listing if it is linked correctly to eBay.