Their domain was only registered one year ago and renewed again for only one year. That is a huge red flag. The identity of the person who registered is privacy protected. Another huge red flag. I would have nothing to do with them. Read:
Identifying Obvious Scammers and Their Websites
Domain Name: GEXIMM.COM
Registrar: CENTER OF UKRAINIAN INTERNET NAMES
Whois Server: whois.ukrnames.com
Referral URL:
http://www.ukrnames.com
Name Server: NS1.UKRAINE.COM.UA
Name Server: NS2.UKRAINE.COM.UA
Name Server: NS3.UKRAINE.COM.UA
Status: ok
Updated Date: 26-jun-2012
Creation Date: 20-jun-2011
Expiration Date: 20-jun-2013