Feckin expensive mate...and if it doesnt arrive or gets lost and you sold it on ebay, the wonderful folk at paypal will probably refund the whole lot to the buyer if you aint careful, so you loose your engine, and a couple of hundred quid of YOUR money on shipping.
Get the shipping paid by gift through paypal seperately or a bank transfer to be safe, so that cant be touched.

or get him to arrange collection from you and pay from his end so its his problem.
We have shipped engines and stuff abroad, its a gamble we take as a business though, and overall we are ok using UPS or someone similar fully tracked.
It hurts if its your money out of your pocket you loose though...and your businesses money if you own the business! LOL