Yeah, you got ripped I'd say. Bud can lose up to 75% of its weight just from evaporated moisture. Ready-to-smoke buds have stems that have a nice "crack" to them when you break them apart. I'd take it back, but I doubt that someone who sold that crap would actually take the time to care about your concerns. If there's nothing to do but save the bud, I place it a wooden box for a couple days with a packet of that salt or gelatin beads that come in shoe boxes and what not. If you can, weigh it before and after to see the difference.