That really is not a very good deal. The VSX-810S is last year's model and while it does have a lot of features it is also missing a few features. While it has 6 channels of amplification it only emulates Dolby Digital EX, meaning that the rear surround (6th channel) is only matrixed. Pioneer corrected that issue with the VSX-811S this year by including DTS-ES Discrete. The VSX-810 was also missing Dolby Pro-Logic II which I feel is a must have if you watch TV or VHS tapes.
By going to PriceScan.com I was able to find the VSX-811S for $286.99.