Remember This Is A Glitch And Could Possibly Get You Reset/Banned So Use At Your Own Risk

Working After 1.04 Patch

All this requires is an Under $50k car like the Maibatsu Penumbra fully upgraded (sells for 108k+) or any other under 50k car fully upgraded. and at least 1 friend online. I can only confirm this for Xbox Live but this might work for PS3. I'll just keep the steps short and sweet compared to other tutorials I've ever made.

How To:
1. Have your friend sit in a public or private lobby. Your friend needs to stay in this ONE lobby for this to work
2. Sell your car and immediately click Start > Online > Find New Session
3. Either be invited, or join your friends session
4. Car is still in your garage in the lobby
5. Jump to step 2 again
6. Rinse, repeat, profit!

The only thing to be mentioned about this is that this only works as long as someone is in one "persistent" lobby. By this I mean, as long as someone is in a lobby without leaving it, that lobby seems to not recognize the car being sold. The second that lobby is closed\your friend leaves, you will no longer have your car after that latest patch.

I'll admit there's still one more way around this current patch, it is pretty lengthy... I encourage anyone else who figures it out to keep it under wraps until at least the next patch. Let's get a nice solid three-for with this sales glitch! (Meaning lets keep this persistent through the possible next patch as well if you figured out the third more complex method!)