RM500 is a good budget.  My budget per-model is always under RM500 too.  With that you can get ready out of box 1:10 scaler rock crawler/racer WLtoys truck like mine as shown below:





Just go to malaysian shoppee site here: (https://shopee.com.my/search?keyword=10428%20rock)
and you'll find that model that fits your budget, they are all the same models as mine under the key word '10428'. Just make sure you bought from reputable vendor and do research first.

Almost double the price of course it's better, and it's quite a bit bigger. Depends what you're looking for.

Its a good buggy but if for the price and 1:14 scale size i'd rather buy full size 1:10 scale branded buggy for the same price like the TAMIYA DT-03 NEO FIGHTER.  I have a 1:14 size buggy at its was kinda akward size to join serious R/C crowds even for bashing especially looking for the right spare parts like tires and etc.

TAMIYA DT-03 NEO FIGHTER
https://www.youtube.com/watch?v=SIYZ_IMb_N4

hey man, have you bought your RC? if you are in selangor. PM me. let's bash together 
a friend is selling his HSP kutiger rally with brushless combo for RM500.

if you want to play RC. you need to watch lots of videos then decide on what you want.
my first almost true RC is 12428. smaller version of the 10428. love it to bits but I bash it too hard until people also dont want borrow me their kits after seeing what I do to mine. not that I am a great basher. I am just too noob at this  if you like the 10428. just get it,man 
I recommend it over the 12428 because you can use vaterra parts.

anyone have any idea on how can I put rear sway bar for the 12428?

Malaysian sell expensive on Tamiya, here where i bought my Tamiya at www.rcmart.com.
For DT03 after conversion is RM356:  http://www.rcmart.com/tamiya-47371-dt03-fi...?cPath=420_1183

There's no custom cost since its just kit of un-assembled plastic parts and shipping is below USD$26.  However you'll need to get hint from youtube for the assembly.  You'll need to have your own radio, battery and servo still its cheaper and beneficial long term.  Do not order battery and radio along with the kit else the custom will hold it.  You can buy radio and battery locally.

so what type of rc car you are interested in now?
do you like scale?

example of rc car type:
touring car
drift car
pancar
rally car
trophy truck
short course truck
monster truck
buggy
truggy
rock racer

many types to choose from
common brands in your budget:
WLToys & Feiyue: parts can last quite a lot of abuse. parts are cheap.
HSP : play within its limits and it will be fine. parts are even easier to get.
WPL : they make crawlers AFAIK. if you like to sit down and tinker with your RC. they are worth it. get the kit and build it yourself 
Himoto : cheap yet small. not as durable but lovable to race