One of the hassles of ebaying is the sending of goods efficiently.
The parcel industry is in a highly competitive era and many good deals can be done, especially if you send regularly and open an account. Citylink, Business Post and Interlink Express are the market leaders and after research I find that Interlink Express do the best job. From an account holders point of view you can do everything on the internet, including print the labels out and they pick up same day and deliver the next. From the recipients point of view they can see through fantastic online tracking exactly where their parcel is. The real beauty from a sellers perspective is that not only can it be tracked, there is an information box that gives the delivering depot address and telephone number so they can enquire direct anjd give delivery instructions without you being the middle man.
All the above carriers have tracking systems of some sort but the Interlink one is far and away the most up to date and will instill confidence in your buyers.
Their web address is interlinkexpress.com
All the depots are listed but be warned, one off deliveries are expensive. Account holders can negotiate substantial discounts.
Hope this helps.