Update:
Yesterday, I was in the accessory shop (when I went there to fix the front parking camera) and discussed about the Dashcam. Previously, when we were discussing (on phone & WhatsApp) the guy over there agreed to exchange the existing mirror Dashcam for a new Dascam and the price structure to be discussed in person.
Whilst the camera fixing work was going yesterday, the shop guy checked my existing mirror Dashcam and told me this one was an old model and they will not be able to get a buyer as now-a-days better options are available in the market for a new buyer so he not interested in exchanging the old one for a new one..
They had only two brands i.e Tany-iCam with wifi feature and JVC without the wifi feature. He quoted Tany-iCam price Rs.4800 and JVC Rs.6800. The Tany-iCam has lots of features, but there is one disadvantage because the cam has to be fixed with 3M tap on the windshield which cannot be removed. JVC cam is very good and looking nice, but I don't want to buy something at that high cost without the Wifi feature.
Finally, told him that I can consider Tany-iCam provided if he can take back my existing camera otherwise not interested in the deal.
So, that's it and I simply left after settling the bill for front parking camera and one car perfume. Will look out for a good Dashcam online or from some other shop nearby my place.