I have seen boat loads of bare ls1 bare blocks sell for the $200 range in the last couple years. This one below had much more with it. You can buy complete turn key motors with a trans for less then a Dart block, that's not bad for a block good to well beyond 1000 hp!!
http://cgi.ebay.com/ebaymotors/LS1-C...58102523QQrdZ1