Sixpack on a 318 engine ?

It's like, 340's were limited in years of production, and considering only a few produced, and haven't been produced in over 50 years, and folks throw it out there like they are in every junk yard for 100 bucks in running condition...... lol
Here in Canada people asking $1500-2500 for just a rusty 340 block, a complete engine in need of a rebuild $3000+.