SingPost has recently replaced their SAM machines to the black
coloured ones & I email them if they can still be used to
purchase postage labels using coins & here's their reply..
Dear Mr
Jufri
Thank you for your
enquiry.
Customer can continue to purchase stamps from the new machine.
However, payment is by NETS only and a minimum charge of $2 is
required.
Yours sincerely
basket, now can't use coins
anymore..