Best time to buy Embark?

I tested my two girls earlier this year, and it was so fun! I had a wonderful experience. My grandparents thought it was so cool to see, and they’ve asked how to do it for their dog too. They’re not very well off and the test can be expensive, so I wanted to buy it for them so I can give it to them when I see them next as an early Christmas gift. I know there’s a sale right now, and I’ll be seeing my grandparents at the end of October or beginning of November. So should I jump on the sale now, or will there be another later that could be the same or better?