[ It's an interesting conversation. Spock's experience with humans is that they don't often speak with this much formality or precision. He appreciates it, but he also notes the contrast from his expectations. ]

Sellsword? May I assume that is a colloquialism for mercenary from your home? I am no soldier-for-hire. Quite the opposite. I am a scientist. Money holds little value to me.

[ It holds none, really, but he is realistic. If they are now in a world where money may be a factor, he will make concessions within that to survive. It's a foreign enough concept that he would prefer not to engage with it, but at least it is straight-forward. ]

I am also trained to protect myself and others with minimal damage and loss of life. If you are concerned about your ability to protect yourself, you may stay close to me. I think I will leave any negotiating to you, however. I suspect you are more skilled in that art than I am.

[ There's an edge of gentle amusement that creeps into his voice towards the end. Spock can use reason and logic, but he knows he's lacking in his ability to appeal to emotion or use subterfuge. ]