Now days offers are being given to all types of products and people with low budget of purchase will only have offer percentage towards the product into their mind and might not look for the product value. Aadi is a special festival where you can enjoy more offers and witness the situation you mentioned.It may happen very rarely as the retailer find offers as tool to sale their old good.
As a customer it would be worth if we look at offers for same products in different shops.Finally the decision is up to you and no shop keeper will force to buy the product since they may get another customer looking for the offer.
I think that you are one among the oldest member of the site, I would say you to please put a full stop immediately after the last word and then leave a gap to start the next letter that too in Capital form.
"All men who have achieved great things have been great dreamers"