I'm willing to take a FREE vouch to review as return to attract more buyer and to proof you're legit seller.
if your asking what is my crendentials then
I got lots of vouch review here in Bitcointalk and here my most recent vouch reviews:
PM ME
Not free -> Only buy with payment BTC,ETH,BCH and XLM

I mean to vouch for it, if really works.
I even willing to pay you if really works but need to check this method and vouch it.
For the sake of other buyer.