When searching for transformers don't forget to sort by newest, it's in the top right corner. Here's the link for all the latest right now,
https://www.amazon.ca/s?k=transforme...date-desc-rank. I'm waiting for arcee. It was released a few years ago and it was impossible to find, so hopefully this time I can pick one up.
As for sales, the bigger items, like Scorponok, I assume will hit toys r us easily and we can pick them up on sale. I'd use amazon for the hard to find items like Arcee.