Complex sentence: In the past "Buy One Get One Free" and Meal Deals (a selection of products for a set price) were common in stores, although these have now been reduced and replaced with products offering bigger packs at the original prices.
Split into simpler sentences: In the past "Buy One Get One Free" and Meal Deals (a selection of products for a set price) were common in stores. These have now been reduced and replaced with products offering bigger packs at the original prices.