SuperCycle SC1800 Mountain bike

Almost new SuperCycle SC1800 18-speed rigid mountain bike. Has front and rear shifers, reflectors, nearly brand new tires, and great brakes. Frame is on the small side for me at 6'1" but I could ride it fine if I didn't have a different bike already. Tires are almost brand new. Full honesty: I don't know much about this. A friend's condo recently had some tenants move out, and they left a couple bikes behind in the bike lockup. Just trying to recoup some costs by selling. Frame number is clean.