Unicc has cheap CC
I have used them lots before
their checker is automatic
and refund is automatic
but there's limit on checker.
if you do too much refund then the checker will show "live" for dead CC
most cc shop use that function.
the reason why I stopped using cc was because there was a time where I was getting too much dead cc.
on your website for jstash, on your profile they show you how much refund you can get so you have an idea. that's what I like with jstash. he is transparent.