I believe Spin is no longer.
The bike isn't the greatest suspension design, but FREE is good! Chances are the fork needs some attention. I'm guessing you'll probably have to replace the elastomer stack inside the fork. Those will be hard to find. You'd probably be better off, spending $75 on a cheap fork and get you out riding. However, I wouldn't spend much more than $100 to get that bike rideable again.
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"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger