Yeah I've paid my dues doing IRL sales, when they say this, you want to sink your teeth in like a pitbull and not let go.
"That's great to know - - before you go, do you mind telling me what specifically you like about my service offering, and what you're not completely sure about yet? I'm always trying to fine-tune the value I offer to my clients and I'd love your opinion".
Prospect: "um, no it's fine, I just need to think it over, it seems a bit expensive"
You: I understand, it's an important investment you'll be making, I agree - - I'm curious, what do you feel is the right amount of money to invest to get the results you're looking for?
Prospect:"well, I'm not really sure...I want to see who your competitors are"
You: oh, yes of course. It makes sense to explore your options before making a decision. Here's a comparison chart we've made, a side by side of services provided and cash outlay (send them a comparison pdf or physical copy if it's IRL)
Prospect:"oh, thank you...I'll have to talk this over with my business partner"
You: ah, yes of course - - perhaps I could help you with that. Here's a youtube link of our product/service presentation - - basically it explains everything we talked about today, and also has an FAQ section at the end - - would you like me to forward this to you as well as your business partner, I'm sure it'll make things more convenient"
Prospect"yeah, that's actually a good idea, send that video to me"
You: Of course, right away, just sent it. I'm curious, what kind of time frame do you have within which you want to make this decision now?
Prospect "well, if my partner gives me a go-ahead, then I'll probably make a decision in a week or so"
You: That's great, as a matter of fact, if you want to have a group call/meeting with me and your partner, to flesh out the details, I can definitely schedule that for next week.
etc etc etc
Brownie points if you spotted the languaging and presuppositions in that example