I wouldn't think it would be a problem, and I have posted abroad in the past - recorded delivery or whatever the international equivalent is called.
The buyer pays before you send the item, and so long as you are clear what service you'll be sending it with, and what the cover is if it gets lost in the post, I'm not sure too much can go wrong can it?
Their feedback sounds good, especially as they've dealt with camera stuff before on eBay.
If you're changing the auction status, I would say something like "international bidders please make sure you contact me before bidding, so I can provide a postage quote". This also gives you chance to check their feedback and you don't have to sell to anyone who seems dodgy.