Can I buy ENS domain in grace period?

I'm considering investing in ENS domains and have come across the concept of a "grace period" for such purchases. Could you elaborate on this for me? Specifically, I'm wondering if it's possible to buy an ENS domain during this grace period, and if so, what are the key factors I should be aware of? Is there a risk associated with purchasing during this time, and if so, how can I mitigate that risk? Additionally, what are the benefits of buying during the grace period, if any? I'd appreciate any insights you can provide on this matter.