Chart shows the price of Klinklang #77 at the end of each month going back as long as we have tracked the item.
So far in 2020, we've been averaging about one per month (and if you go back to the initial release in December, we've actually had 13 individual drops in three months, making the average closer to four drops per month since the series was announced), although the average is somewhat complicated by how you count themes that come with multiple drops, like the original Theros Gods during Worlds in February (technically, the Gods were five individual but related drops, although there is an argument for counting them as one big drop since buying all of the drops together was an option)
There are 121 PSA 10's known in existence, with thousands of collectors and Pokmon enthusiasts willing to pay top price to add this special card to their collections
Now let's turn to synergies and win-cons
I think this personally is a way better use of my money than blowing hundreds on commander masters boxes
Compared to the Hyper Rare cards which the Mega Hyper Rares have replaced, this new Pokmon rarity is an order of magnitude scarcer