Clear Blue Fertility monitor test sticks, where to buy?

[Jsjskanamks]

After the witch came on month 6 of trying, I just broke down and purchased a CBFM and want to use it this cycle where should I buy the test sticks? anyone have a good place that has them cheaper then cvs (49.99) also I see a lot of people selling them on ebay, is using ones that expired the previous month bad?
Really hoping this helps and I get my bfp for a Christmas gift

 

[waitingongod1]

I bought mine on amazon!