FWIW, for the site's owners---If you don't know what you're looking at and it comes at you unannounced, this seems VERY MUCH like a scam--take your pick --watering hole, phishing, Facebook hijack...
The signs are there, unfortunately--The use of a general post office, some products that don't quite fit (boxwood, ponderosa pine aren't imports and are a bit overvalued), high prices , claims of selling for years, but newly registered site and sales effort. All of those are used in online exploits by cyberthieves. I've been phished a lot, I know.
FWIW, I understand the use of the PO box is for security. I own bull terriers. Bull terrier breeders (And legit pit bull show breeders) follow very much the same "no names, addresses" thing to keep varying kinds of thieves from stealing their dogs. Some breeders avoid updating their web sites to make them look as though they're no longer active--unless you "know someone" who knows different.
John G's endorsement is enough for me, but word up bonsaiimport, be aware you rang some alarm bells...
