The prices for generic Lipitor, also known as atorvastatin, vary depending on the pharmacy and location. According to GoodRx [2], the average retail price for thirty 20mg tablets of atorvastatin is $9.32, while the same amount of the 40mg tablets is $12.33. However, the price can be lower with a coupon or discount card. SingleCare [3] states that the average price for atorvastatin without insurance is $22.63 for thirty 20mg tablets, but it can be as low as $5.00 with a discount card. Drug Patent Watch [1] provides information on the expiration of Lipitor's patent, which allowed for the production of generic atorvastatin and likely contributed to the lower prices. It is important to note that prices may vary and it is recommended to compare prices at different pharmacies and use discount programs to find the best deal.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.goodrx.com/atorvastatin
[3] https://www.singlecare.com/blog/atorvastatin-without-insurance/