I'm not exactly sure which system I plan to use right now. I am going to have to do a little more reasearch.
Here's a jacobs coil on ebay. it may go for way under what I would want.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33691&item=2441006885

I would accept $200 for my system