are dummy tickets legal l at cheapest price

It is quite acceptable to use dummy tickets to apply for a visa application. A real flight reservation is referred to as a "dummy ticket" in this context, meaning that the flight is actually delayed but not cancelled. You should always make sure to obtain a real dummy ticket with a live, verified PNR in order to prevent having your visa canceled.
Get fake tickets right now for about INR 350 or $5 in less than ten minutes.
The website https://www.onlinedummyticket