well.... alot of them required cash (but there 
are atms around)
some of the more expensive cels I bought 
people let me use a credit card, but some of 
the people wouldnt even consider it, and so I 
had to leave, get cash and come back.  it's 
probably safest to have cash and just hold on 
to it REAL tight.

I brought all my cels with me ( I only have 
about less than 2 books so it wasnt that 
heavy, and its easier to trade, compare and 
buy when you have them with you)