Aldi have cheap drill pumps at the moment, I bought one the other day in Finglas for 12 euro. I haven't used it yet so cannot say how good it is, but for 12 euro you can't go too wrong.
https://www.aldi.ie/en/specialbuys/thursday-specialbuys-13th-june/products-detail-page/ps/p/drill-powered-pump/
Hey Johnny,
These were Discussed elsewhere previously.
Things to consider is its suitability for food use and it's temperature resistance.
Poison yourselves, I don't care anymore :-X
http://nationalhomebrewclub.com/forum/index.php/topic,746.msg7510.html#msg7510
I had a feeling it was too good to be true :-[