I believe most purchase over Amazon or Ebay or the other dealer portals we have here in India......
online portals are online portals........there are many and there is no standing guarantee that the portal will be there after a week or 2 years etc......one needs to be careful......if i were you and had limited dealers around, i would trust the local indian online portals for purchases ...at least i can drag someone to court in case of any dispute.....based on transaction details and printscreens i maintain till the purchase or deal is closed.