Well...it seems all prices have gone down since I bought one, but this
http://cgi.ebay.com/ebaymotors/Ignit...Q5fAccessories seems to be similar....
This model D1977a is so widely used all across GM models I'm not surprised mass production allows for a low price. Those in the $45-$49 range would be OK for me. In fact, the electronics in these is quite conventional basic analog transistor circuitry and nothing justifies sky high prices. When I started suspecting mine, I used conventional analog electronics testing methods on the bench and I could pinpoint exactly where the problem was.
www.avigex.ca/xport/IgnitionModule.jpg
$229 as shown for some is almost criminal.