Most people go to sites like Coinmarketcap.com and look at the market capitalization of a coin to decide if it is cheap or expensive. The price of one coin is meaningless.
BE Aware that heavily pre-mines will have hugely manipulated market caps.
Be wary of coins with Moderated Announcement and/or support threads.
When vetting always check supporters past ventures and trust rating. Trust rating can be hard to gauge so you can find ratings from members you do trust and gauge from their circle.
Never forget investing is nothing but gambling. Consider your money already gone when it's out of your control. Of course there is nothing wrong with altruistic support of what you believe in.