go for it. i stay in Singapore and prices for AVR and amplifiers are almost quite cheap in Singapore, specially the outgoing models. Tell your brother to get the original bill of purchase, which your brother can show at airport (if asked for)to avoid any customs duty.
It will work in India, however you will require a plug adapter (if your wall socket is not universal type), as the socket is different in Singapore. Alternatively, you can purchase good quality cable from local hardware shop, as it is possible to detach the cable from AVR. Also take a look at marantz SR5013, roughly 50 dollars more.