What is the best brand ovulation tests that dont cost alot

Elaina • Mother of 4 living children,2are my husbands,1 is mine and we finally had 1 together. When i was 18 i miscarried a child and 1/23/2015 our son was born sleeping
I am sick of seeing negatives and really want my rainbow baby. Af just started yesterday. My husband had started a new job so we have some extra money so I am going to buy preseed and a bbt thermometer and ovulation tests. I am going to prder them on amazon so I would like to know which brand is best but also doesnt cost to much money still.