@Love4sound it is completely irrelevant, if you want to know the purchase price of a item listen on the for sale, you can ask for it, and then if you end up buying it tally it up with the invoice that is given, if any discrepancy you can make a forum post to alert other members. Its simple.
Prices have been ever increasing due to weakening rupee & every person wants to get maximum buck for their stuff (mostly), so they would obviously be looking at the current selling prices especially if the product in question is still under warranty & could pass as a new product.
It is still at your will to buy or pass the product, as someone earlier mentioned you can not be forced to buy, especially not at the price you feel wrong due to any number of reasons.