Hi, radiosah,
In SVO-2 arrival hall there is a stand for Moscab company. They drive minivans, that cost approx RUR 1500 (about USD 57) to the city center. You pay at the stand, the price is fixed.
Minivans are big enough, if there is really a LOT of luggage you can take 2 minivans, it will cost you RUR 3000.
At the current exchange rate it makes about USD 113.
Perhaps, you can arrange in advance with this company about meeting your clients, for this purpose, look here.
http://www.moscab.ru/index_eng.html
Enjoy