THE BEST JUICER IS THE ONE YOU WILL USE!
But seriously Though. Just start making juice. Get one that you can afford that will work for you. Craigslist, Ebay, and Facebook Marketplace are all a great start at a fraction of the price.
This is my Go TO current Juicer. All around this is the best one I have found so far as for as price, speed and quality! The quality is not as good as the Pure, but this juicer produces a great yield. Works with leafy greens and hard fruits and veggies. Cleanup time is about 4 minutes. And it is the fastest of all the slow juicers I have used.
Two-Step Hydraulic Juicer
If you are healing cancer or severe chronic disease this is the juicer for you.. The Pure Juicer produces the best quality juice of all the juicers. This juicer is the recommended juicer for the Gerson Therapy. It is the highest end juicer, the pulp is bone dry, the juice has no foam, and no pulp and is the smoothest and most nutrient dense juice you can find. They will last forever and will produce the highest yield of any juicer. I highly recommend this one if you are healing something life threatening or want to get the best quality juice money can buy.
This vertical slow juicer is one of the best juicers out there. They produce a great yield, minimal oxidization and are very easy to clean. The downside to this juicer is they are quite slow. They require a lot of elbow grease, and you have to cut the produce into very small pieces. I recommend this one if your making one glass at a time and are concerned about price.
Breville Centrifugal Juicer
Breville Centrifugal Juicers are the cheapest juicers you can buy. They have a high speed motor that rips the fiber from the juice which oxidizes and creates a lower quality juice. The juice has less nutrients and does not last near as long as other types of juicers. They are fairly easy to clean and can be bought at pretty much any department store. A great juicer if your broke or just wanting to try out juicing.