Depends on state laws, but in most cases the answer is yes. That is why you should always have a car checked by your mechanic before you sign any paperwork, especially the warranty disclaimer!
Yes
Well no if the modifications are illegal.
Yes, if you tell the buyer the air bags are missing, and they sign a notarized statement releasing you of all liability.
it is not legal. this would be considered fraud. only problem is proving this.
yes, actually it is legal. Depending on some countries. You can sell as many as you like. Just check with your local government -Many states require you to have a "bait dealer license"
It's legal, but unlikely ... unless you have a very desirable car.
No, it is generally illegal to sell a gun to someone in another state without going through a licensed firearms dealer to facilitate the transfer.
A wholesale car dealer is a car dealer that cannot sell vehicles to the general public, and can sell only to other car dealers.
Purchases from a dealer are governed by Federal law, not state. 18 for rifle or shotgun, 21 for handgun.
You'd have to either sell it to an FFL dealer, or sell it through an FFL dealer on consignment.
Yes, a dealer can sell a car to someone with an expired license. A dealer can sell a car to someone who doesn't have a license at all.
A distributer will sell wholesale goods to a retailer/dealer. The dealer/retailer will sell the same good at a profit to the consumer.