Start with smaller items until you get a feel for ebay, much better to have a deal go bad on a $5 hat than a $205 bike.

When I've sold a bicycle on ebay I will sell as only shipping to the 48 contiguous U.S.states. If someone wants it shipped to Alaska or Hawaii or outside of the country then I'll offer to deliver it to a local bike shop and let the buyer sort out the shipping with them. Nothing gets shipped with an ebay sale until I have cash in hand.