What do you think a fair price is for my 1967 318 engine

I would say a bit more, do/make a video of it running and walk around the car to the rear
and let a good sound bite get in the video along with showing you pull the valve cover breather off so they see no blow by, heck the carb and intake valve covers and parts are worth 300 JMO, and you live in Houston :color: so you will have allot of people that can come by and hear it run I would think 8) My Opinion = start an asking price of $600 OBO. JMO
300 sounds very low for a complete good running Teen...