First off, they are Grade-A New cells BUT do get Amy to verify that in the chat, she will.
There is no Direct E-Mail as such, and you should communicate through the Alibaba chat, so "contact the Vendor" which opens a Chat system, you can post questions and get your answers through there, it is also the tracking of what you discuss (to cover your back side).
Alibaba & AliExpress do not accept PayPal unfortunately. They do accept Visa MC etc but some folks have had issues. I used TT Direct Transfer from my bank and it was instantly there... Xuba has accounts with North American Branches of HSBC ? I think it is, so it's fast.
S&H has been a bugger because of the Corona Virus but this seems to be getting sorted slowly, they are a bit backlogged in some cases... That being said, I have been getting product delivered (smaller stuff) since late last week, so goods are flowing out now. There is lead time where they test each cell once picked and then pack them up (taking photo's to show you along the way) as well, Amy posts those in the Chat which you can then download.
I asked Amy to include a spec sheet for the cells with every order as well (something most vendors do not do) and they are now tossing in the busbar & bolt kit as well.
Keep in mind when dealing with these vendors, keep your language "clean & simple" with no slang or abbreviations. Ask direct & simple questions, and most importantly, be patient, the translator softwares they use are not the greatest and there is a significant time difference. For me, in EST it's 13 Hours difference, PST 10 hours I guess. Amy works extra hours to be able to communicate with us in a reasonably quick time frame but for some that's not good enough... again patience is important.
Hope that helps.