So little update:

I took the car out of storage to troubleshoot and it had even more issues.

* Spoiler stuck up with light flashing
* One fog-light stuck on
* Every brake related light in dash is on
* Speedo not working

I decided to bring it to a dealer for diag and they say all signs of the above point to the ABS Module. Then then told me the price ~$1100 and that I couldn't get a used one because the VIN is burned into it. They also told me the couldn't troubleshoot the misfire issue because of these other problems.

My first question is: Can this module be replaced with a used one or are they telling the truth and not trying to take my money.
Second question: could this module cause the misfire issue?

Thanks,

J