What about payment term?
T/T:30% down payment;Balance against copy of B/L(Preferred).
T/T+L/C:20%down payment;Balance by L/C at sight(Preferred).
100% L/C at sightPaypal, Western Union.
D/A,D/P,time L/C.
Term 2,3,4,5 will be charged bank rate and/or bank fee and/or insurance fee if applicable.