No, they are willing to mark the value down, they don't give a &%@$ about legal issues from your side, you will have to ask them, though. I did that, save me 12.5% from all kind of taxes.
Customs review is hit or miss, too. I import a lot of stuff, from anime figures to games, mechanical keyboards... etc... sometimes, I have to pay tax for something with $20 value declared, even marked as gift (just a few cents, lol) and with my recent purchases from Armygroup, 4 keyboards, 2 keycap sets, total value marked as NT$3000 (about $150?), they charged me nothing... can't complain, of course.
Armygroup has great service, 1 of my 2 keycap sets has all the key over the numpad blank, I ask them if I can exchange. They reply and told me to keep the keyset for "future use", they will send me another set as I ordered.
My impressions so far with PCHome and Armygroup are all great, definitely recommended. Sameday shipping, great customer service, willing to lower the shipping cost if you purchases multiple items, mark as gift and lower the declared value if needed...
PS: I don't live in the US, so YMMV.