I'd always recommend new sellers to not buy or fake reviews. Not just from a moral view point, but also from a business one - if Amazon catch you (which they're quite good at now) that's it, no more selling on Amazon for you.

I totally agree with you that the Amazon review system needs a complete overhaul. I've had fake reviews from competitors damaging my sales, and have seen people get hundreds of reviews in a few hours. The issue is that it's too easy to leave a fake review (you don't even need to buy the product), and too few customers leave a real one. Less than 1%.