Many places seel "crate" style engines. Marine engines are almost identical, except for the CCW versions. As far as a 'good" price, that depends on what you have already, and what you want, and how far away it is. The 416 I just shipped was $500 to get to his house in CA, from CT. A decent performance 440 long block with good parts, and all the good machining, will cost in the $3500 range. Check the "for sale" adds here..