It pays to watch your receipts on your Purchases.

I  get very regimented in checking my receipts for all purchases all year, but especially this time of the year.

I went into a local Big Box Store (My least favorite place to shop)  Found a good deal on some work boots.   Went to pay for them with some other stuff and it sounded high.

I had the teller check, and the boots didn't show up as on sale.  My wife was with me and had some of her own purchases and had a problem of the same kind.

Getting a deal is great if you actually get the deal.  Check your tape when you get it and make sure you are getting the value they are posting.