"I don’t see any evidence of shadiness, just some sloppy communication"
@lousyreeds1 - You have received helpful feedback from people here with many collective years of experience with this stuff. At the end of the day, we all make our decisions and live with the results. IMO, you are being very generous to this vendor, as is your prerogative. As I read through your description of the experience, my "red flags" kept popping up with my end conclusion being that none of the excellent vendors I have purchased from over many years would have practiced as you described. Consider your comment, "I do wish they had explained before I paid (which I had to do via bank transfer prior to pickup)". Who requires a "bank transfer" before you would be able to pick up a component? Also, consider how all the things this vendor didn't explain to you ahead of time contributed to outcomes in their favor, not yours.
@bigdoghoss - the consumer protection bureau primarily deals with financial issues such as regulating banks, lenders, and financial companies, and enforces laws and practices related to mortgages, credit cards, and loans. I doubt they would have offered any tangible protection related to the timing of when an audio equipment vendor decided to initiate a warranty period or whether the vendor accepts a return.