Question about the dollar tree store pregnancy tests?

ive been hearing about this dollar tree store. im getting very impatient with waiting to take a pregnancy test & i dont want to spend too much on one. Are the tests at the dollar tree store reliable? im only 6dpo so i wont test now, but ill try in about 5 more days. Are the tests there actually $1, its hard to believe lol but the question once again is are the cheep test reliable. has anyone gotten a bfp 10dpo? thanks for your answers