We have exchanged maybe 10 emails with the domain broker and he is asking us almost $20,000. We have make a proposal for $1,400 (Similar domains sell for this price), and the broker told us that our offer is too low to even be taken to the actual owner. Sic.

We try to find an alternative of the .com, like alternative domains as .io, .net, .ly ... or to add a prefix (my, your, get, the...) or a suffix (app, service, hq...)

I wonder what's the best practices?

PS: We are a web-based SaaS for businesses.