Every once in a while Amazon is having a fire sale of Morel Maximo component speakers, with prices as low as $80-something, with free shipping. The current price is around $125. Anyways, they reportedly have pretty high sensitivity, so they might work off head unit power acceptably, though I personally would prefer to throw in at least some kind of cheap amplifier.
This^^ , I got my front comps for $85 shipped and the Rears for $38 shipped from amazon. Let me tell u they are amazing and I would pay much more for them.