IBM's first commercial quantum computer was the IBM Q System One. However, it's important to note that the field of quantum computing is rapidly evolving, and there may have been advancements and new offerings since then. At that time, IBM did not disclose the specific cost of the IBM Q System One publicly. Instead, IBM offered access to their quantum computers through the IBM Quantum Experience, a cloud-based platform that allowed users to run quantum experiments on IBM's quantum devices over the internet. IBM also provided access to quantum computers through their IBM Quantum Network, a partnership program with selected organizations.
I recommend visiting IBM's official website or contacting IBM directly for the most up-to-date information on their quantum computing offerings, including any associated costs.