I am a successful Level 2 seller here on fiverr since 2 years and sharing my experience of using “Send a Custom Offer” here on fiverr.
My, 1 of every 10th buyer always ask me (how to order or send you this specific amount?) we agree during conversation and discussing job. I always used to generate “Send a Custom Offer” for them of a specific money we agreed for the job, so the job gets done on fiverr and we both have ease of mind. So I do not need to spend mony time to show them how to order, if they are new to fiverr.