Don't time it to end on a Friday or Saturday night, either. Sunday through Thursday, an hour or so after the evening meal, whenever that is wherever you are - North Americans tend to eat early.
Have you ebayed much before? If you don't have a feedback rating yet, you might bide your time by buying and selling some small stuff (books, CDs etc) to get your number up. Lots of people won't buy from anyone with no feedback, even better get your rating over 10.
Also, why not put it up in the For Sale section here? There's a few Europeans who look here, and you might save yourself some Ebay charges. Costs nothing to try.