I've heard talk before like "mine is good", "I had a nice experience", "my steering wheel is great", "100k miles and not a problem yet". I've also heard about "maybe we can meet this guy at this place on this date", "I saw a beautiful motor and model car displayed" and "maybe things will change" and "give slack whenever possible". I say none of that is worth taking to YOUR bank.
Consider this. Let's say a fictitious business does 500 deals and 50 are indisputably bad and some are VERY serious and go unresolved. That's enuff for me to get out the 10' pole right there. You can judge whether the source is good or not but most people want things to go smooth so try to give the benefit of the doubt to them especially if you've heard all the stories before. The individual instances are most important to the individual who inherited the problem. But to ignore the SOURCE of those problems gets into areas like honesty, commitment, morals, and integrity. You can fix bad jobs eventually and easily. Changing a person who has conducted themselves a certain way over decades (intermittent or not), whether it gets good for a while or not, is not so easy. I'm glad I had wonderful parents and role models. I wish that for everyone. All this is about the CAR AND BUILDER DETAILS. There's more.
The BUSINESS is a separate consideration and equally important. While your money is being spent by someone else (kinda scary...why don;t they have any money?), is the business active or inactive? Is it incorporated or sole proprietorship? Big deal. Based upon hints (some stated above), are you prepared to have total trust (or to lose that money)? You can start by going to State Secretary of State for opened or closed articles of incorporation, You can go to county offices for private businesses. You can go to BAR for possible violations operating without a license. You can see whether the business has failed to pay for licensing fees (like if a check bounced), or renew papers, or paid taxes. You can even Google Map any address posted and see whether it is a store or a rented mailbox (not that a dated pic tells you what's inside). All kinds of stuff available IF you take the time. Couple this with the above and you might be able to connect the dots and come to a MEANINGFUL opinion than "I did OK" implying that you will do OK today or tomorrow.
And then there are the LAWS. State and Federal. Like or not, whether ignored today or not, they are on the books. If you choose to ignore them or allow others to because you think it will be OK, you have to be prepared. You could lose your car or whole estate. I have real, documented examples that makes skins crawl. Imagine having your new $100k+ RV confiscated by the state and told to "Go after the seller" or your insurance pulled after an accident that causes people to be hospitalized and you have to cover the bill (unless maybe you try to avoid debts by closing a business and seeking protection under limited liability or bankruptcy). That MIGHT work.
The good news is I built two brand new custom vehicles from scratch not so long ago. Both took some extra energy, a bit more money and time but they were 100% legit throughout. I was comfortable that they would pass ANY law or test. Brand new matching numbers vehicles just like a 2018 whatever. Later I trusted someone and believed things I was told. The outcome was not so nice. Once settled, I won't go that route again.
Today I would not buy anything but a completed car (from Troy...ha). It would be fully registered in the seller's name prior as a COMPLETED car (not a donor part) and already roadworthy. I would have it fully inspected and check VIN as well as all the other records associated with that VIN at the state capitol. Only then I would pay only the legal owner. You are more likely to be fine as well as anyone you sell the car to in the future.
I wish I had more time to explain details and was free to do so. But we are busy on a "Mission from God". Just a general public service announcement about no particular business or builder. Take it or leave it.