Ebay is definitely an option - shop and compare as they say.
It can be a bit iffy because of so many sellers, who to trust? The ratings might be something to go by, but from a recent experience, I would not purchase from someone that has been there for only a year. Nevered received the item after nine months of waiting, by which time the seller was no longer a member. Luckily, paypal was good enough to fully reinburse both the item cost and shipping.
regards,
Jack