1. You shouldn't deal offsite, always keep deals onsite.
2. This @ isn't worth the requested amount of money, as other members have already stated.
3. You're posting in the incorrect section.
If you want to sell a Social Medium you should get it appraised Privately or in the "Appraisals" section under the "Marketplace".
Once given the suitable amount of money for what the Username is worth you should put it up for sale under "Social Mediums", don't do anything on Kik and stay onsite.
Hopefully this helps for future reference.