It's not from me, but Nick Kypreos, who has proven to have sources around the league. He doesn't spew around much thsese days, but usually what he tends to say is accurate.
I'm not going to find the exact quote, but around a month ago he basically said that the number the Rantanen camp is asking is something along the lines of 11.8-12.4, and the Avs have had no interest in going anywhere near that. The front office/ownership don't see him as important as MacKinnon, and thus don't want to pay him that close to what MacKinnon makes.