Hello,
I work with SEO in [login to view URL] for 5 years.
Before giving any estimates, please, provide URL of website you need to promote, and the region you want to promote it for. Because for regions of Moscow and Vladivostok TOP 10 will be very different.
Also, please, provide words you'd like to promote, as there can big competition with those words...
If you have any questions about my qualification of SEO in Yandex, please, do ont hasitate to ask.
Thanks,
Alexey