If the average developer's time is worth $60 an hour, then it would only have to save 4 - 8 minutes per month for it to be worth it, or 10 seconds a day.
At SeatGeek, we use Lastpass. I don't personally know what it costs - yes, I'm a lazy operations person - but it seems like it might be $24 per person at our size[1].
I personally use 1Password and if it had group password sharing, I would be lobbying to switch every day of the fucking week. The lastpass interface is confusing, slow, and ugly (I've beens spoiled by the spit and polish we've built). $8 per person compared to what we may be paying now seems very small, so it's probably not unreasonable (to be fair, enterprise pricing is hella weird).
I think it's $24/user/year actually, but we'd be happy to pay more, because Mitro offers a superior solution for us. I hate the Lastpass UI and the sharing options aren't nearly as refined. 1Password doesn't work on Linux, and requires installing a local app as far as I remember.