I need help, please!
 

I see this cub cadet on craigslist but I dont know what model it is. Im not real versed on serial number ID's but im sure someone out there is.
My guess is either a 70, 71 or a 100. My final question is if its worth it or not, I will have to drive a good little ways to get it. Thanks.

http://richmond.craigslist.org/grd/2982366651.html

It has a k241, 10 Hp, so it's a 100, however it's not a 1950s like they say.

That is a 100.1963 to 65

Also the 100 had the larger air cleaner than a 70.

Yep, that's a 100.