If the terms and agreements of the sale is not met legally yes they can if they have retained their legal title to the vehicle
go pick it up, if they refuse, go get the police
Depends on the private seller.
Yes
yes
online, car dealership or a private seller!
The state doesn't repossess your car - private companies do that on behalf of the lienholder. They don't charge you for private property left in your car when they repossess it - that would be illegal. They charge a "storage fee" for the items they remove from your car. Underhanded, yes, but they can legally do it.
www.google.com
was there a guarantee or was it sold as is?
Yes you can if you have the receit
If you are a GA resident, you do not have to pay sales tax as long is it is a private seller, even if out of state private seller.
No, they are allowed to come and take it away.
YES, if there is no breach of peace