I know it was yours, hence why I was asking if you had any info you could divulge!

Bargain indeed, sorry. Especially given the extreme collector interest in anything official for Tetris MD. (I reckon you could have got 20x that from a Euro MD fan) So good in fact I thought it was a scam to begin with. Then I heard it was one from you and that put my mind well at ease. Stunning item for an MD fanboy like me. The closest I'll get to legit Tetris MD for a while, albeit the proto must be much rarer than legit Tetris MD carts.

So, anything you can say about it? Where you got it? When? Did you compare a rom dump to the one on the web? Maybe I should drop you a pm, I just get very excited about MD stuff, especially Tetris related.