A lot of times when peeps sell nass for that cheap it's because they bought a whole load of mud snails (Ilyanassa obsoleta... formerly know as nassarius and still called that by many). They don't really belong in our tanks. I'm not saying peeps are selling inappropriate snails on purpose.... cause that's just what they are sold as. I would get pictures to properly ID them first.
shipping will be from 20706 if anyone wants to look up shipping charges, I can normally do next day UPS for $20, if you are closer to Maryland shipping will be less. The box will be 6x6x6 and weigh 2 lbs.