These guys are not BSing you on the cost of a good 428. My dad has been offered 3,000 for his, but he wont part with it. There are some options that are better hidden. For instance the 406 shared the same bore as a 428 but ran a 390 crank. And 410's ran 428 cranks in 390 bores. These are much easier to come by with out saying the magic words (actually numbers) 428.