Xbox GTA 5 online?

A friend of mine just told me that he bought 600 million credits for 25 euro in GTA 5 Online.

I just looked on the internet and I only find 8 million for 74 EURO?

Does anyone know better than me?

On all known key sites you only get 8 million + possible bonus.

I think your friend either paid a modder or just a little himself.

* modded 😳

So I think he did a duplication glitch. You clone your own vehicles and sell them.

But have a look at YouTube.

I don't know how to modd yourself.