below RM300, locally u can get Ducky Zero or Rosewill RK9000, but most of us here would recommend u to go RK9000 for a new unit within that budget range.
if u are more adventurous and can stretch ur budget a bit more, get ikbc f104 as mentioned by our 016 brother.
that is great build keyboard for a mid-range with excellent value for money due to it's top quality keycaps material and "acceptable" design/font (and u get 1 more set of 104 keycaps for FREE!)
gaming mecha's price is high because of gimnicks and brand name. (kinda like buying overpriced nike shoe that comes with poor quality)
other mecha keyboard's price is high (or low) because they focus more on build quality and using standard layout.
all gaming mecha keyboard will have this fate. some normal mecha keyboard with stock backlit will also suffer this same fate.


this is what most normal mecha keyboard can do.

little to no restrictions in modding keycaps design!
almost all after market keycaps will be suitable for normal mecha keyboard!

but if it's gaming mecha keyboard.
u may change the keycaps with after market keycaps.
but u'll face problem at the CTRL WINKEY ALT SPACEBAR row.
because 90% of gaming mecha keyboards comes with non-standard layout. so the aftermarket keycaps set wouldn't be able to fit in.
u'll need to compromise here n there or get novelty 1x size keycaps for winkey n fn.
and probably mixture of 1.25x modifier and 1.5x modifier, depending on the board's layout.