I have used the pregnancy tests off ebay. I loved them because they were so cheap and I could use as many as I like and not feel guilty about the cost which was fantastic as I had many many many days of testing more than once. LOL!!!
I always found them accurate. I always got my -ve when I wasn't pg and +ve when I was pg. My positive on the ebay one showed up darker than the expensive one I bought from the chemist.
Give them a try cause the best thing is because they are cheap it doesn't matter if you don't like them.
Good luck.