The VR-09 seems to sell for $899 new, even though the MSRP is $1165. It's pretty common for stores to sell a keyboard for a good bit less than its MSRP. (Personally, I think most keyboards' MSRPs look rather inflated.)
If you're seeing the VR-09 for $750 on eBay then presumably you're looking at a used item, restocked item, or refurbished item. A store will often have some specific policy for determining the prices of restocked or refurbished items-- e.g., they might knock off 10% for restocked items, or 20% for refurbished items.
I saw a used VR-09 listed on Craigslist for $700, but it's been sold already!