How do I buy bundles?

Excuse me, could you please clarify how exactly one goes about purchasing bundles on your platform? I'm a bit new to this and would appreciate some guidance. Do I need to follow a specific set of steps or are there any prerequisites I should be aware of? Also, is there a limit to the number of bundles I can purchase at once, and if so, what is it? Lastly, is there a specific fee associated with bundle purchases, or do they follow the standard transaction fees? Thank you for your assistance.