I Want A New Oil Burner, But What About The Co Test?

I currently have a longwood wood/oil furnace with a Beckett oil burner. I don’t know how old the Beckett is, but I’m having issues. I’ve had a local heating guy come out and he’s helped me, but now I’ve gone and broken a few things (ceramic pieces on electrodes, copper fuel line) since, so now it really won’t work unless I put some money into it. I know the electrodes and copper line won’t be much $20-25 or so, but I really don’t know how old this thing is. The bad thing is that I just spent $105 on a new pump for it, but that would always fit the new burner too if I ever have problems with it. I can do all of this stuff myself, it just takes me a lot longer than paying a heating guy $80/hr to do.
What I’d really like to do is just buy a whole new burner so that I know what I have and I know it’s new and should be good to go. I’ve found one online for around $350 here:
[url=http://www.pressureparts.com/Burn… I’d just need to get the 9″ air tube to match mine.
I know that prices online are about 50% of what I’ll pay from some local supply store. I paid $105 for a fuel oil pump locally (through my heating guy’s contractor discount) and found the SAME one online for $54.00. Anyway, I can install this myself since I’ve had mine unhooked and hooked back up. The main reason I’m hesitant to buy a new burner is because I was reading I’d need to get a specialist to come out and do a CO test w/ their special machine to make sure it’s within specs. Does anyone know anything about the CO test and about how much it would cost? I know it sounds stupid to not buy one because of this and it kinda is.