A good parcel courier is not easy to find. You need a reliable company that will be able to take your parcels and delivery them next door or internationally. Cheap parcel delivery options are available but will they match your requirements?
If you are sending something that weighs more than 2 kg makre sure you properly package it. Your parcel courier should be able to provide you with the right packaging material for free. They usually carry their logo so it is great publicity for them!
Are you shipping something you have bought on ebay? Make sure your courier has track and trace so that you are sure where the package is at any time. Especially if you want to make use of ebays paypal payment security you will have to use a parcel courier that accepts this regulation.