Private sellers are the worst for this. As a dealer, I'm legally required to disclose that a vehicle has a salvage title at the time of sale. I don't deal in anything but clean titles period, but that is the law. A buyer does have legal recourse if the dealer fails to disclose it, in writing, and the buyer finds out later. 

With a private sale, it is all risk as all private sales are considered as is, where is. It is absolutely vital that you check the title before talking price or anything else to see if it is branded. Private sellers I've come across that are shady usually list the title as a "clean blue rebuilt title". There is no such thing. Either it has a clean title, or a rebuilt title. 

Right now, the market is volatile. This increases the odds of dealing with a scammer exponentially as flippers are trying every get rich scheme out there to capitalize before the bubble bursts. If you are buying from a reputable dealer, you should be ok title-wise. If buying from a shady dealer, it could be an issue. Either way, be sure to take the time to read all of your documentation. Car purchases are emotional and it is important not to get caught in the moment. I have had customers that came in looking for a $50k car and they see their dream car here for $100k and want to sign their life away. I always ask them to think it over for a night. I'll hold the car for them and if they still feel it is the right car for them, come back and let me know the next day. I've had more than a few apologize and tell me they got caught up in the moment and really can't afford to double their budget. Not all dealers will do that, so it becomes your responsibility to keep yourself focused and make smart choices.

If I may offer a few quick tips to buyers looking to buy from private parties in the current market:

1. DO NOT bring cash with you to view the car/test drive it. There are a lot of people being robbed right now by "sellers" who just want to meet up and take your money. If the seller asks, "Are you bringing the cash?" (This happens), walk away. The only time you should have cash on you is when you are finalizing the transaction, preferably at your bank or local police station.

2. Thoroughly check the title and ask for ID. If they can not provide ID to match the title credentials, walk away. Legally they can not sell you a car that isnt titled in their name, even if it supposedly belongs to their Dad/room mate/friend/hamster.

3. Do a thorough test drive prior to purchase at both highway and slow speeds.

4. Have a good mechanic inspect the vehicle. If the seller refuses to allow this, walk away.

5. Remember that you always have the option to walk away. You don't have to buy the vehicle.

Guess that's about it. 

They lie all the time. That's why you have to examine documents carefully before purchase. If the title doesn't match the description or is not in the name of the seller then run away from the deal.

Does a bear crap in the woods

That's why Scotty always says do not trust anyone when buying cars.