I decided to give them a try with an inexpensive item. In cases like this, I make up my mind beforehand not to be overly dismayed if things go wrong.
The item is listed for 549/- at Amazon, 575/- at Flipkart. Vlebazaar list it for 429 with free shipping. They also offered a further 10% discount coupon at checkout, so I ended up paying 386.10. I placed the order on Jan 27 and they shipped it the same day by ShipRocket-Delhivery.
Tracking shows that it's on the last leg of the journey and I expect it to be delivered tomorrow or the day after. This is quite fast for the remote region I'm in. Let's see if they sent the correct product and, if so, what condition it's in.