Question about the Ticket Vendor
The recipes should be there, but in their own category not under the random rolls. I've had no problem with finding them on a character who hasn't even done the university.
Other than overlooking it, another possiblity is if your current recipe inventory is full or you don't have enough tickets to buy a recipe, it won't show.
p.s. it takes 150 tickets to buy a standard io recipe.
I wish that was the case, but I have enough recipe space (only have 1 recipe on me) and plenty of tickets. The option to buy regular IO recipes simply is not showing. I can roll for random ones, but just can't buy the regular. Frustrating.
I actually asked this late last night, and got the answer provided to me.
Move the slider to a level ending in a 5 or a 0 and the common recipes appear.

@Catwhoorg "Rule of Three - Finale" Arc# 1984
@Mr Falkland Islands"A Nation Goes Rogue" Arc# 2369 "Toasters and Pop Tarts" Arc#116617
Thanks Cat! That worked very well. I think this particular trick should definitelly be added to the faq.
I've been playing around with a new villain and I finally made it to the Mission Architect. Well I've managed to earn enough tickets to start buying the IO recipes, but the option is not showing up. I see the recipe rolls, but nothing for common IOs.
My villain is only level 19 so far, but I can't understand why I am unable to buy recipes. Is there a sequence I missed? (I have done the AE beginner mission, as well as the University invention missions)