Product review (5 stars): Bought the $10 one, skipped the $6...this one worked fine
I have bought ~6 different washer pumps at Amazon and the internet in general.  I have stopped buying the cheapest one and move up a little.  Do pay attention to the reviews.  If there are a couple of BAD ones, move on.  There are many different after market pumps being made...some good (like this one appears to be)...some are complete crap and fail in a week.
Caveat emptor.