Following is screenshot from ebay India where it is selling from 1500 - 2250 Rupees which is 30-40$.!!! I don't think this a RARE item so why this much price.!!!
Sellers of this FDC on ebay are eaglefila, philindia02, dr.vijay.vizirani, kamalmedicine and others.
Do you think this FDC is really valued for 30-40$ in price or it's just one method of price inflation.!!!
To inflated the price it's very easy. Open multiple account and start selling same item at different price and in this way one can control the price by buying cheaper and then increasing the price if other comes from actual seller in auction.(and if they win don't pay.!!) !!!
Also to fool buyer change account country such as Canada, Australia, New Zealand, UK, Croatia etc. and with help of philatelic friend or relatives post it from that country (by mentioning longer shipping time.!!)
Sometimes they keep it in auction with different id and inflate price by Shill Bidding.!!(Increasing price on their own or friends item with different auction id.!!)
But as collector we can also dedicate by not allowing this kind of activity by not just buying from the dealer who try to inflate the price. I think it's not written anywhere that you need to have all stamps, FDC, FFC etc for your collection.!!!
Also you will see cachet with 2 different Shades also available from ebay India, but this are not different in color!!!.(error or rare fdc is selling cheaper than regular FDC!!) It's easy to have change in cachet color or stamp color just by exposing particular part longer to sunlight.!! or other methods to make it error!! (Read my blog post How to create ERROR stamps.)