Yup, a 2nd gen (not 1st gen) Prius is a good bet.
There are several reasons that taxi fleets continue to use 'em.
Deals can be found under $4k, though they're harder to find in Canada than in the U.S. because they sold in far greater numbers south of the border (a far greater per capita difference).
FYI, my search adventure for a sub-$4k Prius:
http://ecomodder.com/forum/showthrea...ure-32007.html
Also:
http://ecomodder.com/forum/showthrea...ius-22514.html