Picked this thing up at a Tractor Supply Corp store for $96. Awesome. No idea how long the blade or saw will last but it took about 10 minutes to completely dismember a tub. 
Don't know if it was a good price - impulse buy. Ordered a replacement blade $49.
http://www.cheapautotools.com/details-metal-cutting/28157.htm

Don't know if it was a good price - impulse buy. Ordered a replacement blade $49.

http://www.cheapautotools.com/details-metal-cutting/28157.htm