Forgive me, you are asking for real-time in-depth knowledge to be shared publicly?
After all the extraordinary work the Arterra and all the new developments have done to conceal sale prices!
FYI They REALLY DO require EVERYONE in negotiation to sign a CONFIDENTIALITY agreement. So what you're really asking is for someone to post publically and open themselves up to a lawsuit for your benefit. Hmm... what would they get in return I wonder? Notice served perhaps?
Your request brings up another issue; the start of AGENCY. True real estate professionals take this seriously. If you are ready to commit to making a purchase at the Arterra then please, by all means seek out three San Francisco based real estate agencies on this board - in private. The agents at ZEPHYR REAL ESTATE have done many deals at the Arterra and have expertise in all of the SOBE/SOMA (South Beach/South of Market) area.
You can almost always reach one of us at: 415-695-7707 9-6 pm Mon - Sat, Sun 11-5. All my best of luck. I've signed many of those agreements and am not looking to expose myself while running down Market Street... };-)
Mike Ackerman, CRS, e-Pro
Zephyr Real Estate