Shipping domestically in the US would still be in the $6~7 territory typically, Priority Mail and insured, so an $8 quote seems alright here. If the seller has a solid track record on eBay, then maybe it's worth a gamble. I have done a great deal of international purchases over the last decade, and fortunately, no problems save the usual random broken item. All personal experience, and of course YMMV. Do let us know if you go after any of those pipes though, and if the deal works out alright, yes?