My top 3 affordable branded keyboards:
1. Yamaha PSRF51
A starter keyboard for anyone who wants to enjoy playing music.61 keys, 100 Voices, 120 Styles
Not touch response
Built-in reverb, fixed in voice, non-controllable
No sustain pedal input only on panel.
Can be used with batteries
2. Casio CTK1500AD
120 tones, 70 rhythms, 100 built in songs, 61 Keys
easy to use 'Step-Up' lesson system and 'Voice Prompt'
Dance Music Mode, you can combine and play multiple type of pattern phrases
No sustain pedal input.
Not touch response
3. Alesis Melody 61 MKII
61 Keys, 300 builtin tones, 300 rhythm
40 play-along demos or record your own
Dual or split mode.
No sustain pedal input
Not touch response
My top 3 cheap but does the job keyboards:
1. MK1000 Gear4Music 54-Key
54 keys, not touch sensitive
20 voices
10 rhythm
record and playback
Battery option
2. RockJam 54-Keys
54 keys, 100 sound effects, 100 rhythm
8 demo songs and record/playback option
Sustain on panel but no sustain pedal
Can be powered with batteries
3. Shayson Kids Piano Keyboards
61 keys
It's a kids toy piano
16 Timbre or Tone, 8 percussion, 10 rhythm
6 demos with a mini microphone
Powered by 4 AA batteries or USB
Now the question of which one to buy is entirely up to you on how you're going to use it. If it's for you child and you don't have the budget for the branded keyboards, then go for the cheap one that does the job. There are three choices, just select the one that your budget suits or the one that appeals to you. Anyway, your child will learn how to play using it or if it's you who is going to use it, you will still learn how to play the keyboards whether it's a cheap or a branded keyboards.
On the other hand, if you got the budget and you can afford a branded keyboards, then it's a lot better because it durable, it always sounds better than the cheap one and it feels a lot better as well as looks better. Hope this helps guys.