So, as an intial matter, try to determine if your local law enforcement folks have an online crimes unit. Where I live in Fairfax County, VA, they have a "Financial Crimes Online" unit. I actually used them once when I purchased an amplifier for my home theater from Canada and it arrived with the serial numbers altered. See if you have access to something like this in Texas. If a unit is not available locally, try to determine if the State of Texas has an online financial crimes unit.
Your wire transfer description on March 18, 2020 states that the transfer went to "BA." If that is Bank of America, get their fraud people involved with this.
Next, CarDealFinder.com should not be allowing scammers to operate freely on their platform. File a negative online review with them; this will get their attention. If they do not jump in to help, file a local and/or State of Texas online financial crimes complaint against them.
From your description, it seems to me that this scam only works if the shipping company is in on it. That is why I asked about them earlier. It is possible that they too were duped, but this is their business and they should have procedures to prevent this. It is also possible that the seller used Starx's information but that Starx was not in fact involved. I would be prepared for either of these possibilities, but if they too are a victim, they should be applying their resources to help you.
Following the assumption that you need to light a fire under Starx shipping, I suggest the following:
-- Give Starx shipping LLC a strong negative review online. The company will have people who monitor these reviews closely and this is the fastest way to get their attention to your problem.
-- There is a Starx shipping LLC on the net with US offices in Miami, so I would file a complaint with the state of FL office of consumer protection against them.
-- The feds regulate interstate trucking companies, so I would try to determine where you might connect with the US Department of transportation to file a federal trucking company complaint against Starx shipping LLC.
-- Go after the escrow account piece of this hard. This is actually the worst part of the deal, from what I can see. No consumer would enter into a transaction like this without all the happy assurances about the escrow account. This is the key to the entire deal. I think the US Consumer Finance Protection Bureau has jurisdiction over escrow accounts. File a complaint with them. Then look into state regulation of escrow agents in both FL and TX. Perhaps B of A can assist you with this piece of it.