You've only replied to the secondary component of my comment.  
As stated, for high demand shows, these tix sell before they have a chance to get flagged 5x, since some eager buyer is happy to grab them cheaper than StubHub. This has been brought to your attention numerous times.  There needs to be a way to flag and enforce even after a post is committed.  If you allow this, it compromises the "ethical marketplace" premise, and  prompts speculation that it isn't enforced because you make more $ on the commission. I hope that's not the reason, but you have an opportunity to address this with the new platform. 

 If you aren't going to improve enforcement, having a separate listing option is a valid alternative.  Members expect accountability for this regulation though, especially as a paid service.