I have a K2 proflex 4000 with noleen smartshock forks (girvin), this is all original spec as i have hardly ridden it over the last ten years or so. I have had the bike since new so still have all instructions etc and am considering starting mountain biking again and wish to sell this bike and purchase a hardtail. Is there any retro demand for this bike. Would like an opinion , it would be of great help.