After you have chosen the items to sell and the time and day your listing would end, you have to choose the listing format.
There are 2 major formats to choose from:
# Auction Style listing
# Fixed Price listing
It's wise to use Auction Style listing on items with high demand and low supply. If your item is unique ( like a rare edition vintage fountain pen ) and there are few others sold it's the right choice. This way you'll ensure a large number of buyers will bid on it and the price you planned to sell it at the start will go way up your expectations.
There's always a chance not everyone interested in your listing to notice it within the auction period, therefore you loose some valuable buyers. But that's the way it is. One thing you can do is to set a reserve price for the item. It costs some money, but gives you comfort you'll not sell it below your expectations.
There are few periods to choose the duration from: 1, 3, 5, 7 and 10 days auction.
Some reviewers recommend the 10 days Auction, but I personally think it's a little too much time to wait and constantly check how the auction goes if you are a potential buyer.
So feel free to experiment with the different durations until you find the right one for you.
Have in mind the reserve price gives you comfort, but could scary off some potential bidders.
In the next post I'll cover some basics of using the Fixed Price Listing format on eBay.
Keep on trying:)