
This is the mexican red knee. It is one of the most popular types of tarantula because it is mostly calm and easy to keep.

Although this tarantula may look quite nasty it is the most popular tarantula. This is the chilean rose. This being generally the most dosile and living only one the ground (terrestrial) it makes the best tarantula.

This is also quite a popular speciman, it is the pink toe. This being the least popular out of the three but still one of the best tarantulas for a beginner.
Ask the pet shop owner for more advice on the subject if you wish.