The rough number I use for Chargepoint installs is $6000-$7000. Yes, they are the Lexus option in this market.
But you can get an EVSE, even for a retail usage scenario, for FAR less money.
I have all of the options written up here, starting with the cheapest and working up the price ladder to Chargepoint. Personally I recommend one of the Clipper Creek chargers.
public charging station advice for retail businesses - www.ElectrifyAtlanta.com
My back of the napkin quote was:
Dual head master unit - $7000
Dual head slave unit - $4000
Service fee - So the RFID cards can work - unknown cost
% of electricity used fee - this rate depends on if you are charging people or not. Basically, if you are charging people, they will want more money.
* Master unit has a cell connection to do network stuff (charge people, and reporting). Slave unit connects to the master unit.
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I should also add that if you need a networked system, semaconnect was a cheaper alternative, but still very costly when compared to 'dumb' off the grid units.