Actually, ideal is hand fed n you can get one within the same price. Yes, dukandar is right, if its less than a year to asaani se tame ho jaay ga, n bolna bhi seekh jaay ga.
If the bird is healthy n active, price is OK, go for it. Its a fun taming a TAG. Mine was also shy n aggressive, but within weeks he get adjusted n now very friendly. Also, have started talking.
Rainbow gift mila tha aik dost se, few years back. At that time it was cheap in the market but now a days very costly, if available.
thanks,
Haroon