Earlier posting suggested getting singles.
Second class is S$35 single approx. First class is about S$60 single.
Note: Fares from Singapore are in Singapore dollars & from KL in RM. Thus, Sinpagore to KL is $S68; return (single) journey is same in RM.
Sleepers are S$110/130 out (upper/lower); RM110/130 back
look at http://www.ktmb.com.my/
for destination type "KL SENTRAL" (sic).
You can even pay for and print your own e-ticket.
NB:: tried a dummy booking, and the price bore no relationship to individual fares quoted above :-(
Some trains have even chearer air-con economy (AEC) @19.
[This message has been edited by qadesh (edited 08-10-2001).]