grail is a very subjective term

This is gonna be a lot about what I had as a child.  My brothers and I had probably close to 200 ninja turtle figures not exaggerating.  Most were thoroughly loved lets just call it that.  I had undercover donatello with the real trench coat, I had shogun shoate, warrior chromedome, metalhead mikey, both don and leo winged warriors.  I remember convincing my mom to buy the Technodrome for my brother Ben for his birthday one year.  We had the sewer and the technodrome linked together.  All of the tmnt I had got given to my cousins kids and charity.  Fastforward to 2014 my brother buys me a repop of leonardo and the seed to recollect my childhood collection was planted.  For some odd reason I got on ebay and found Panda Kahn my first tmnt I recall having.  He had an axe and the pistol I remember losing in the car.  I have collected most my stuff in 2015 and missed the big collector boom of the "the toys that made us" and the pandemic made a large spike of new collectors and prices went crazy.  I remember paying 20 dollars for a diver leo in 2015 and opening it thinking nothing of the value it might hold.  I found invisible man mike 2 of them for 40 dollars and he now values for 600-800 depending on condition.  

I want your input.  Fill out what your favorite grails are.