I was looking at older ones on ebay too. Not sure how i found myself on the timing light topic but found it interesting and since I am using MSD stuff I want to make sure it gets timed correctly. Read a lot of different forums last night, mopar, chevy, ford and buick all on the same topic of what to use for MSD ignitions and it was some guys say a dial back works with the same amount of people saying not to use them. Some things I read said no rhyme or reason to it but some dial backs work and some do not. I just want to make sure I use the right one. I think any old non dial back will work but to be safe I was leaning towards getting one of the two MSD lights, they are pricey though.