I would avoid AudiophileChina, Coredump, there has been a number of bad reports about them lately: either buyers receiving damaged items or no items at all. There are a couple of reliable sellers on E-Bay, most notably Jasmine Chine. But their prices are pretty average for the 3322, although Jasmine does have a "Make me an Offer" facility.
I bought mine from DARKVOICE themselves, or rather their "agents" in China - a company called BOYIER.COM. Their site does not allow you to buy direct - it does not seem to function properly - but you can e-mail them at: firstname.lastname@example.org
. But best of all, they are a fair bit cheaper than E-Bay: at the last look, E-Bay sellers were charging £325 for the amp and £50 for shipping; BOYIER were charging £270 plus £50 shipping. I was going to approach Jasmine, but to tell you the truth I do not think he would drop the price from £325 to £270. I went for BOYIER and although they took longer to deliver - they wait about a week before shipping - I had a good experience with them.