Pos Malaysia will be increasing the postal rates from 01 February 2020 for commercial users.
Rakyat (citizen) mail is unchanged.
Here is the media release.
The rates have yet to be published on: http://www.pos.com.my
Once the rates are published, it will be clearer.
Here is a tip: buy whatever you want on eBay or whatever platform and pay by 30 January 2020 in order to be shipped oit by 31 January 2020.
I think it is a good tip.