Starting by asking for a discount.
There are sellers who are charging less than I do, so why not contacting them instead of me?
Or, “if you give me a discount and this works out, I’ll have a lot of work for you in the future”.
More work for less money, why would I want that?
Or, “if you give me a discount and I like your work, I’ll recommend you to my friends.”
Why would I want to work with their cheapskate friends?
“I’m looking for a long-term relationship…”
Err, Fiverr isn’t a dating site.
“I want unlimited revisions.”
Then look for a seller who is offering them.
And so on…