Petsmart is ridiculous on their prices, and Petco is notorious for selling non-aquatic plants as aquatic like a previous poster said. Some of their plants are $10 - $12 that you can buy for literally a buck or two online.
The package that acidcitydweller posted that you responded to yesterday is a good deal. PandaBetta here on the forum seems to have some good options also.
I blame spelling mistakes on my iPad. You should too!