Please guide me. I am planning to buy a new amplifier for keyboard.....
Guitar Amplifier will have a good sound when I used it for Keyboard?
Depends on what keyboard you're using!
My Hammond & Electro sound great though a Marsall amp - if you're looking for a Jon Lord-type sound.
Generally a guitar amp doesn't work well for keys for (mainly) 2 reasons -
1 - the frequency range of a guitar is more limited than a keyboard - top & lower end frequencies don't 'respond'.
2 - *most* keyboard sounds are meant to be heard 'clean'. Guitar amps 'colour' the sound.
PS: I would add that at the price you mentioned, you won't find anything even half-decent (unless you're VERY lucky!).