Roundabout Ticket Vouchers For Sale

Has anyone heard of Roundabout Ticket Vouchers for free shows. A guy on eBay is selling 6 of them and reading them, they appear to be good for any of the current Roundabout shows but not Robber Bridegroom. Is it legitimate? I'd hate to buy them and find them to be counterfeit but at $55 per voucher, it seems to be a good deal for a free ticket. Thoughts?

Calling Roundabout seems like a smart idea to check on the logistics. That seller has received 479 positive reviews in the past year so I'd say it's doubtful he'd intentionally swindle you.