Do you want to buy New or Used Or Refubished?
If you want to buy New, check out Amazon.com, Ebay & put the model number in under Yahoo and they'll give you comparison shopping from places like Next.tag, epinions.com, pricegrabber.com, etc. Google also does the same on the right hand column but for shopping I prefer Yahoo.
If you want to get a good used bargain, use Ebay & check the sellers feedback & make sure the item is complete & is listed as very good or better condition. If the words "as is" are used, don't buy from the seller. As I've previously posted you can get a very good or excellent used $1200 receiver like the 3801 between $375-$450 on Ebay with remote & instruction book.
There are also sites that specialize in refurbished stuff. I won't touch that stuff but you can find them online through Google.