With Megabus to Hartford service ending..here is a Boston to Hartford Price Comparison...Megabus vs. Greyhound.
Web purchase on Greyhound is about 15%, which is about the same discount as a Student Advantage discount. The only advantage of a Student Advantage discount over web is that you can purchase at the counter, with the oh-so friendly Greyhound ticket agents.
The differences between Greyhound refundable and non refundable tickets are really really confusing so you might want to double check, but here is how I think it works. Tickets with Greyhound used to be open-ended, but now they should be used on the exact date and time on the ticket, but I think there is leeway that they just have to be used on the same day (not time). There is a 40% refund penalty - so I guess that make its basically worthless to even pay the refundable surcharge. Plus, I'm sure you'll have to wait 5 weeks to get some paper check from Greyhound.
Here are price comparisons as they stood on August 28th, 2009.
Megabus: $13-$15 (If you're lucky $1, or unlucky $18)
Ghound Web: $24 non-refundable / $28 refundable
Ghound Counter: $32 non-refundable / $ 38.50 refundable
Ghound Web: $48 non-refundable / $56 refundable
Ghound Counter: $57 non-refundable / $65 refundable.