My main concern with this piece would be the full Röhm inscription, which represents most of the value: without it this SA dagger would be worth around 750 US$, with it we are talking +/- 5000 US$.
What I don't like is that the inscription has kept all of the etched blackening, while the blade has a lot of grey area's.
Grey is the result of removed surface oxidation by cleaning.
The chances that this was a standard Pack SA with the inscription added later is fairly high, in my opinion. Also taken into account that the makers mark is not the "close-to-the-guard" version (see added picture, dagger in the middle), which would assure that it had a Rohm dedication in 1933.
Best regards,
Herman