Guarantee'd progression from Act 1 to Act 10. You create the class and provide info on what build you are looking for. This will include using currency found while progressing. This does not guarantee you will have all the items needed for your preferred build by the end of act 10/Prologue. This is simply a service offered to get you through the acts in the game.
No items will be traded away unless it is for a needed item with currency procured during the process.