Did you buy it on eBay?
eBay is know to have grossly over inflated RRP's listed, even more than youe case for some items.
Check out this example:
http://cgi.ebay.com.au/NEW-26-ALLOY-...QQcmdZViewItem
Bike "worth" $999 RRP only sold for $142.50 !!!!
Now that is a bargain, until you go to K-Mart and find it for $149.
RRP is only a rough guide, can be very rough at times.