Funny, I was just doing the same analysis myself using my SPS Snapshot in Splinterlands itself. Thanks for the link to the calculator.
I have a similar amount of SPS points to you and am astounded by how much the airdrop will be worth if this SPS pricing holds (and its going up as we speak).
I also made some major card purchases a few weeks ago to improve my win rate and these cards are up 5x in price since I bought them.
I recommend you get into the game itself as it is really interesting and tactical and challenging.
I've had to get used to losing a lot more than I used to but the rewards are much greater.
Yeah man, one of the best decisions I've made in the past few months has been diving into some legendary cards.
And I did it even before knowing about the SPS drop.