They are a travel agency. They don't run buses. They'll buy you a ticket on a bus run by someone else.
assuming you are referring to the tourist bus .... why not buy the ticket directly from the source ? inkaexpress.com ... $50 plus 3.50 charge ..
I have now bought my tickets from inkaexpress.com but out of curiosity if anyone ever used this inkaexpressbus.com to buy their tickets? they don't seems like a scammer, they have got a proper website and their staff will respond within an hour ..
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