I'm familiar with his listing and it gives me a chuckle each time. Imo he is asking way too much. In Socal, if a 318 core is going for $300-400 and a 360 core is going for $500-600. Then a 340 core should probably be in the $600-900 range depending if it has x-heads (overrated but people pay more for them) or other performance goodies on it. But that is just MY opinion...
If his motor was 100% ready to drop into a car and run it then it would much more reasonable