I agree this man must be stopped, there are several threads on Fb inc one started by our own member Mitresh, I think Verokamath is going to come to a sticky end very shortly because too many people have seen the posts on Fb & he will be challenged at first sighting at a coin fair.
I also have purchased coins from this man 2 years ago, back then all the coins I had were Sultanate & Mughal & all genuine & very cheap to buy, then these weird shiny chocolate coloured coins began to appear of all sorts of hard to find Princely states such as Rewah & I had 3 or 4 before I got a bit wary & stopped because prices were going far too high & I could see the coins didn't look right somehow.
The odd part of this is that some very common coins also have the same colour treatment, I had 20 cheap mixed coppers from him, mostly Gwalior & Sailana & several unidentified & when they arrived I saw the shiny chocolate colour again. These coins have some treatment that is hard to remove & I've carried out some experiments on some of them.
They won't darken when exposed to Sulphur, heat them red hot with a blowtorch & when they cool down they look exactly the same whereas usually copper coins change colour if treated this way.
Greed will be his downfall because now the market is flooded with these coins, Ebay as usual will take no action but I imagine there will be a mass of complaints before long as more collectors realise they have fakes.