They aren't bad, but Optimas are not what they used to be. They also will only be about 75 amp hours versus 100 or more in a wet cell. But...you can mount them anywhere you want in your bus without fear of gassing and the rule is that they can't be charged upside down (they can be discharged though).
Thanks guys, I think I will pass. It would have been a long drive to get them anyway, so as it seems to be less than an amazing deal, it's not worth it to me.