Re:
Sadly, these are not worth very much at all. I have one and I think I paid less than £30 for it, with all the original components, although it was in tatty condition. However, they are nice, light frames. Yours looks like it has had the brake cable guide near the seat tube clamp cut, presumably to get the V brakes to work. If anything, that might devalue it further. As a matter of interest, though, how well did that work?
Anyway, this is one where you're likely to be much better off selling the parts separately. Unfortunately, I can't see what all the components are. If the derailleurs are the original STX ones and in good, clean condition, they are worth about £10-£12 each. The shifters/brake levers, probably about £20-£25 if, again, they're the STX ones in good condition. The wheels, perhaps £20 each, with the same provisos. I'm not sure that is the STX crankset but if it is: £20-£25. Rockshox (XC30?): £50-£60. Brakes, seatpost, stem: about £8 each. These are prices to sell, not to hold out for top whack/a mug. Frame: you'll probably end up giving it away - perhaps a good one for a community project where kids are taught how to build up bikes. Do you have the original forks, too? If in doubt about prices, check eBay, but look at the prices items have actually sold for, not what people are hoping to get.
Alternatively, restore and enjoy. These were good, fun bikes.