What brand for "internet cheapies"?

I know I've seen lots of talk and pics about using the simple one line/two line cheapie OPK people buy online but can someone recommend a particular brand, or does it not matter? Or what's actually the cheapest? I want to continue using the clear blue digital one once a day but start using a cheaper test to check multiple times a day. I got 10 days of flashing smiley and no peak last month.