For anyone going down the ebay route... please take a healthy dose of blood pressure reducing tablets on a daily basis cause you WILL need them. Ebay constantly change the goalposts, any time there is a dispute (for whatever reason) its easier to presume that you will have the decision go against the seller (it almost always does), Ebay/paypal's costs will always go up, your profits will always go down (unless you raise your own prices to cover the cost increases which most of the time means you are more expensive than your competitors), the Royal Mail is not your friend as a certain percentage of your items will go amiss and finally get used to the most bizarre and downright nonsensical demands from customers - ie wanting 6ft x 4ft canvases from a 640x480pixel image and NOT understanding that the quality will be poor or can you make me a mug with people from Man U/Chelsea/One Direction etc, and so on and so forth.....
Oh... and if you get an order at 11.59pm, two minutes later it will count as a full day since ordering, so if you have a 1 or 2 day dispatch policy.... you better get used to turning things around PDQ.