There are a lot of sellers promising the same, but they are always sold by new members who have nothing to lose by running away after selling a number of hacked accounts to unsuspecting customers.
Having a skype ID won't help your cause either, but you need something a little more if you're going to assure customers that the accounts that they're buying will be replaced continuously every time the password gets changed by the real account holder.
In a point.
Since seller is newbie with only 3 activity, the "lifetme warranty" is worth nothing.
Whatelse, OP said that accounts are not shared, are private. Normally people sell hacked accounts for this amount of money.
The question is:
Are you owner of this accounts then ?
Also another question- Do you consider giving VOUCH COPY to have your service checked ?