I think, Silver also has good resale.
I would strongly urge to buy either Silver Color car without own, or White Color with own. In both cases, it is much much better option, than to pay at least 30-50,000 Rs. More after a few days or weeks. Prices seem to increase in coming days.
Believe in win-win situation and buy right now. Paying 10-20,000 Rs. Own Now is still much much better than paying 30-50,000 Rs. On new prices and without own. And trust me, own would be there on new prices too.