As a bigginer 1 bitcoin or 1 BTC is good price for me because i have no idea to get 1 btc so there for i am willing to learn more how get or how to recieve more points or btc.
Every downwards are a good time to buy, currently the price is declining so if you can afford then buy already or wait for further major decrease just monitor the market.
You can buy btc in exchanges but choose a reputable one or if you dont have capital you can start earning it by offering your skills or joining in campaign. Start learning and dont rush things, do a research here in the forum and you will find important information that newbies should know.