This tip comes from Michael Huxley from the Hive@Mansfield:

You may have heard about Martin Lewis and his "Money Saving Expert" Website

For those interested in selling on eBay he has some interesting articles:

Selling on eBay
http://www.moneysavingexpert.com/protect/selling-on-ebay

Getting a cheap parcel delivery service: http://www.moneysavingexpert.com/shopping/cheap-parcel-delivery

and boosting your income
http://www.moneysavingexpert.com/protect/make-money