Yeah, but i cannot abuse it too much. The HE-500 has a nice case and if my package is opened and the inspector searches for the HE-500 real value I'll be fined by 100% of the tax (120%).
I was thinking of declaring it as a HE-300 or just as HiFi headphone with a value somewhere 99-199 USD, but I have no idea if it is safe to do that using Fedex,
The best way to try to avoid taxes all around is using USPS Priority Mail International, which will take quite a long time to arrive and it's not completely safe specially when declaring a lower value.
The guys at Hifiman are real nice. When they send you stuff, they label it as "gift" rather than "goods"...similar to paypal. You can probably ask them to send the receipt separately and/or online, so no receipt is in the box.
Get a carrying case and not the hard box. The black carrying case shouldn't attract much attention.
Also, regarding shipping, the slower the shipping process, the more likely you are going to get ****ed. If you do one of those 2 day super fast priority shipping, chances are that it'll blow by customs. Might as well as put the same money in shipping and get it fast rather than pay it on customs.
I suggest contacting the customer service at Hifiman and working out the best scenario.