Your choice of juicer machine depends on:
For example, if your juicing for a large family you will probably want to get a wide mouth whole fruit juicer that lets you make lots of fresh fruit and vegetable juices fast.
These centrifugal juicer machines make excellent juices from most fruits and tough vegetables such as carrots and celery, and are usually able to juice tougher greens such as kale.
However they are not able to juice soft leafy greens or wheatgrass very well - if at all.
I've owned a couple of small centrifugal juicers, the latest being a £10 job from Tesco's. It was surprisingly good, and this is a great way to discover if juicing is for you.
An alternative option if your short on space or money, and mainly interested in wheatgrass juice, is a manual wheatgrass juicer.
If your interested in wheatgrass juice and fresh green juices, then I recommend a purpose built wheatgrass juicer. You need to decide if you want an electric wheatgrass juicer, or if a manual wheatgrass juicer is more suitable.
My current juicer is a lovely electric wheatgrass juicer called the Samson Juicer. As well as making fabulous wheatgrass juice it also juices fruits and vegetables brilliantly. Other excellent juicer machines for juicing wheatgrass include the Green Star Juicer and Omega Juicer.
And if you love fresh orange juice then an electric citrus juicer is an inexpensive way to treat yourself and the rest of the family to freshly squeezed orange juice.
There is also a good range of manual citrus juicers which can come in handy.