You actually haven't read Tec 850, have you?
I have read it.
So story doesn't matter? Is that what you are saying?
No story does matter, you are absolutely correct there, I will say Tec 850 is an important Sirens key book that does lead in to GCS but it's not their 1st appearance. We should be focusing on the plot line of the Sirens movie as that is where other specs lie.
I 100% Agree with Ween because I have read the whole arc, and there would be NO Sirens series without what happened in Detective Comics first.
Tec 850 is Cameo + Origin of Sirens and the only reason why these specific people are against it, is because CBSI broke the spec, and these guys all missed the opportunity to pick up copies/or are just continuing their stupid witch hunt against a spec site that does better than any other when it comes to finger on the market pulse.
I've asked everyone of these loudmouth trolls for their ebay names, and they all refused because they are likely hiding something. They were PM'd to discuss, and they replied with rhetoric that cannot be backed up (as usual) and left the conversations.