Boost can be for medals or solo/party mmr. 0.002 BTC for each medal boosted, or 0.008 BTC for 1kmmr boosted.
I can do 500 mmr in one day for 0.005 BTC. Maximum boost time duration: 7 days (1 week). You decide how fast you want me to boost you.
Contact me for more details:
Steam acc: https://steamcommunity.com/id/realmaaaan