I have emailed several businesses in the UK offering to distribute flyers for them at a university that they are located close too. I find this gig on fiverr and mark it up at a huge price. One of the businesses is interested however wants me to come in to talk to them. I don't live close by and the fiverr seller is willing to take on the lead and give me commission for the sale. What % commission should I take to hand over the lead to him?