After buying my dad (in bangalore) a bd player, i also set up a bd- rental account for him.
I chose, moviemart, where i also rent my bds from.
the rental price includes to and fro shipping from delhi. you can borrow 4 movies at a time and there is not ime limit for keeping.
my dad has gone through 2 cycles so far, and he's quite happy. ( and do note that he lives on the outskirts of bangalore where courier services are patchy)
price depend on the package but i think the top package the price works out to less than 70/- a BD.
pros- cheap, online, bds are almost always scratchless, keep as long as you want
cons- delay between order and delivery (1 day lead time), someone needs to be home to receive the courier)
hope this helps.
cheers