Yes!  I am able to offer specific customer and product discounts not otherwise available at other sites.  With that said, each product listed in multiple marketplaces has identical content. If you purchased the Cognate Unit Lesson Plan at TpT, it is identical to the Cognate Unit Lesson Plan purchased at srtaspanish.com.  In addition, the base price of each set is identical across marketplaces. Individual sale prices may fluctuate due to sales offered by the parent company (i.e. Teachers Pay Teachers site-wide sales).