not sure to be honest, it seems the domain is owned by a private person, so his company could be very legit such as he buys in bulk from companies and seller to public used laptop and desktops (not terribly uncommon I had a friend that did this for years).. the web site reflects this levbel of Limited Liabity Company with a go daddy web site designer look..
whois on the domain name reveals the owner of the domain
registrar URL ": godaddy.com
Domain Name : windowvv.com
Registrant Name : David M Duke
No organization name registered. why I am guessing a LLC instead of a INC company.