In shops the prices are only likely to vary by a small amount, but online they can be vastly different.
I bought the Marantz RC9200 as I prefered the extra hard buttons that this remote has. In the shops they were generaly around £700 - £750, but I got mine online for £600. I could have (subject to availability) got a refurbished ex-demo unit for £500, but none were available at the time so got a brand new one.
I can't remember off hand where I bought it from but found the cheapest price by searching the internet via Google.
Mark.