How sensitive are those cheap pregnancy strips from online?

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I bought some cheap pregnancy tests from ebay. If you have used them, can you share your experience about how good they are? How soon do they show a pregnancy? Today is 11dpo for me and they showed a big fat negative, so I am just wondering whether I should still hope.

i bought some but i never used them until i had actually missed my period. however just dipping them in a cup didn’t work, they didn’t absorb enough urine so i actually peed on the end of mine but once i got a positive i took like 5 of them ( i had a bunch left over so i figured why not) and they all came out positive.
They were accurate for my family member
I’ve always used them and found them to just as accurate as the expensive ones, be patient, x x x
http://www.early-pregnancy-tests.com/3pregtesstri.html
Wait another 48 hours then retest with FMU (First Morning Urine)
See if you can find your brand the in the extensive list of HPTs at http://www.peeonastick.com which lists sensitivity levels etc.