The large 32 ounce will run from $10-16. Its made by Shapley's and looks like this-
Yes, it does smell bad I think its the sulfur in it. Honestly I love MTG when I have a horse with a skin problem. If its just hair growth I prefer any hair oil type product which will be much cheaper.
I use some that you can get at most Walmarts or drugstores called Africas best herbal oil. Its around $2-3 for 8 oz. I just work it into the dry ends. I wash it out before each application just like your suppose to do with the MTG. I also use infusium 23 leave in conditioner (human product) after their baths.