I was quite sure that I had mentioned this. I'm sure I have but I cannot find the post if I did!
Penguin Flight Osaka is publishing this title as limited print runs and once sold out there is no reprinting. As with Paul Brown's Defective Comics and Mind Your Manners (and Browner Knowle series which has almost sold out completely), this makes these comics collectible because they are not printed in the hundreds or thousands -copies ending up on Ebay are very unlikely. That's why I call them "true" investment comics.