This seem like it might be OK. The price is hot, but the vendor seems a bit dodgy.
link: http://www.ug-n-m.com/

you can order it through Amazon I think is a good thing because Amazon offers additional protections.

Shipping is free through the vendor's site directly, but is $5.99 through Amazon. Probably worth the extra $6 to get the protection that Amazon offers.

http://www.amazon.com/exec/obidos/tg/stores/offering/list/-/B00008OE6I/fatwalletcom/104-0798898-6406307

is s400 the only product he selling?

I don't know, but it seems safer if order through Amazon

Something like this happened very recently where a seller posted a product through Amazon and Amazon wrote back saying they cancelled the order in an email EXACTLY like the one ATRajan posted...the seller than e-mailed the buyer with similar wording to the email bananaCream received.

...basically they post on amazon, then when Amazon cancels the order they email you back saying buy it through our website, or western union MO, etc. Usually just a scam.

I won't touch this kind of deal.