Tell you the truth, buying a motor online, from a importer, is a crap shoot, unless of course you know some body in the area that can go inspect it for you in person.
This seller appears to have a good record of selling fairly good stuff.
There is only one guy who has left a neg., and you have to wonder about that one after reading it.
I think the motor set looks pretty good, but, your getting a auto with it though....
I'd ask for larger, better pictures, so you can clearly see what you will, and will not get with the purchase. Its the little things missing that will eat you up money wise (unless of course your going stand alone ECU, and all custom intake side, and turbo side parts) etc.
Anyway, best I can offer is, research, then try to make a good decision....