erm...i just got mine from TS...cannot remember the price but it was abt $50 for each volume wif discount(i cannot remember how much)..n it has 3 volumes..hope it helps..

Hey ME!
That was really great help! Which TS did you buy it from?

oh..i jus remembered that the poh kim at tos payoh central has DIF 4..n the TS at marina square has..actually most of the TS has DIF 4 ..hope it helps..

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Replying to:

Hey ME!
That was really great help! Which TS did you buy it from?

TS selling for $30 a box x 3 boxes for DIF IV. Bought mine from TS AMK Central a couple of months ago.

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Replying to:

Hey ME!
That was really great help! Which TS did you buy it from?