I'd be interested in Dunkin' but  #1) Prices are way too high #2) I have yet to have a DD card purchased here or from Bitify last more than 3 or 4 days (and I have bought a number of them).

DD isn't like SBX.   I'd pay 50% if I can have 5 days before payment (or same 5 days through an escrow).  DD has always been a big FAIL but if you have some secret method I'd buy a $50 card as noted to test.  Most DD are taken from hacked accounts or carded and get closed very quickly.