This is why I can't trust effin mechanics

So,
dads car pulls a CEL this morning, cars shaking like its about to start hopping. he brings it over from the gas station, I took him to work. I get in touch with the local chev cobalt club, the actual president on the forum turns out to be this super nice dude who comes out to meet me with a obd2 scanner (which I dont own... I dont know why...). Scanner doesnt pull the code, doesnt even connect with the ecu.

So I go to my dealership with whom I've done multiple deals with (they sell used 'unique' cars, www.customridesinc.ca (Also I endorse them with no second thoughts, awesome guys to deal with and they will find you any car you want no matter how rare)(and they've got a really nice M5 sitting in there, as well as two E46 M3s for awesome prices). Anyhoo, I try their OBD2, which ALSO won't pull the code. They refer me to the local mechanic, couple of doors down. He comes out, uses their large (commercial model) obd2 and pulls the code. P0302 - Cylinder 2 Misfire. Looks at me in the face, goes 'Oh dude ur not going to like me, come check this out'. Takes me to the back of the shop, shows me a coil pack out of a motor they've stripped, and tell me the whole thing needs replacing and I'm looking at a pretty big number. Do these guys really expect EVERYONE to be that stupid ? I wanted to slap the punk.

I came home, pulled off the coil pack, pulled the plug out of cylinder 2 and sure enough its wet. From the tip, halfway up the threading. So I've got my fingers crossed that its fouled - problem solved. Picking my dad up soon and bringing a replacement plug. If thats not the case, I called the Chevy Stealership to make sure, coil costs 184. 184 bucks from the DEALER. Which I could get for a 100ish. I know it can't be said for all mechanics, (i.e. my gf's family has been seeing the same mechanic for a few decades and the guy seems really fair) BUT - I can't believe the nerve of that d******bag. I wouldve bought a plug from him on the spot if he had offered. But instead of that little sale he wanted me to replace my coil packs and pay him a grand for labour. F****in idiot.