Good deal, or not?

I'm planning on offering $400 for the mixer in the classified ad.  It comes with a dough hook and two 20 quart mixing bowls.

It appears to be 15-20 years old to me.

http://london.kijiji.ca/c-buy-and-sell-business-industrial-3-SPEED-MIXER-W0QQAdIdZ148670717 [1]