Sure you can. Opakbox is based on the PWYW model (pay what you want). If this is overwhelming for you because you are used to paying what is asked or at least discussing it at length, then feel free to take the following guidelines into consideration:
CHF 160.-/h Opakbox has promised too much, is not worth the money.
CHF 200.-/h Opabbox really has what it takes! We like what we see!
CHF 280 per hour Opakbox is awesome! This is exactly how we like to work together!
If these guidelines still don't help you, we will be happy to advise you.