I suggest you either call or go online. Ticket prices are different during weekdays and on weekends. Also if you buy your ticket in advance you get a cheaper price for booking early. Also, booking online will save you money. Too, you can get on board at a BUS stop with ID, and purchase ticket at the next terminal.
What's your departure city? No offense but your question is kinda vague without the departure city. The price of your ticket depends on how far away you are, otherwise I'd be happy to look it up for you.
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