Wholesalers don’t actually purchase the properties they make offers on. They try to sell “the contract” you entered into to another investor before it closes. This is often done through an “Assignment of Contract” with an assignment fee paid on top of what you agreed to sell your home for!
On the other hand, a “wholetailer” will purchase the property themselves from you. From there they typically do the necessary value-add improvements to make it easier for the end buyer to handle. End buyers could be another investor who will do additional repairs, rent it out as-is, or even an owner occupant.