For any discussion in regards to foreign currency exchange and related issues.

Please do check the following currency exchange company websites to compare the latest rates to get the most out of your MYR.

http://www.moneymaster.com.my/
http://eforex.com.my/rates.php
http://www.spectrumforex.com.my (KL Sentral/Sunway Pyramid LG2)
http://www.e-globex.com.my (KL Times Square)
http://www.vitalrate.com (KL Pavilion)
http://www.klremitexchange.com/rates.php
http://www.mountainmoney.com.my/
https://www.maxmoney.com/mmrates.html
http://www.mymoneyshop.com.my/
http://www.afrresources.com.my/
http://www.yusulmoneychanger.com/

Previous thread:-
V1 https://forum.lowyat.net/topic/254693

It's a matter of demand and supply.
Some people want to get back MYR for their foreign notes asap, so they will sell it to you for cheaper than money changer rates. Whether genuine or not, it's the risk you take, as with any online dealings, there's always a risk involve.