If you didn't know that K2 was making mountain bikes in 1998. . .then you don't know this K2 -- because this bike was not made by the same company that is putting the K2 name on bikes now.
I found a 1996 catalog posted online. It's a Swiss catalog & I bought mine in Europe, so maybe K2 wasn't selling in the USA back then: http://www.retrobike.co.uk/forum/viewtopic.php?p=613078
Mechanically, this bike is perfect -- practically brand new with less than 50 miles on it. . .look at the all the pictures ...
My wife won this Dr. Pepper mountain bike years ago. It has been stored in my basement and never ridden. A neat collectible if you are into soda pop stuff, especially Dr. Pepper. Still has hang tag. $150 obo . May trade for something of interest. 573-378-0522