I quote from the book:
UNDER NO CIRCUMSTANCES WHATSOEVER (and particularly if offered large discounts) SHOULD YOU GIVE THE WHOLE LOT IN ONE PAYMENT - YOU COULD, AS OTHERS HAVE DONE IN THE PAST, LOSE THE LOT! IN FACT THE OFFERING OF LARGE DISCOUNTS FOR UP-FRONT PAYMENTS IS OFTEN THE FIRST SIGN THAT THE LIMITED COMPANY HAS SERIOUS CASH FLOW PROBLEMS. ALSO, IF THEY ARE IN POSSESSION OF ALL YOUR MONEY THEN THEY HAVE A FIRM HOLD ON ANATOMICALLY DELICATE PARTS!
IF POSSIBLE, ALWAYS USE A CREDIT CARD TO PAY – THEY ARE LIABLE FOR ANY LOSSES YOU MAY INCUR AND ALWAYS PAY BY SMALL INSTALLMENTS!!!! If a school refuses to accept installments then go elsewhere.
Even though I continually stress this point, I still meet people who have bought my book, disregarded this advice, and lost great sums of money!!!