I thought I should list a few real Buddhist amulets rather than you buying rubbish online, and it is possible to get very good ones at an affordable price. This is one such piece, a Phra Somdet from Luang Phor Wan that was made last year and is beautifully cased.
This has been pressed from a mixture of Waan 108 plants, crushed stone from a spiritual mountain and added to it is powdered Leklai. The front shows Buddha on his dias with a Takrut below him, which is very traditional, while the back says the temple and has the Yant to the 5 Buddhas. It is an exceptionally well made piece that brings good fortune, Metta, popularity and protection from all forms of harm, which includes black magic.
An exceptional piece of work that measures 1.75" and comes with the Namo Dtassa chant and the card of Luang Phor Wan. This item must be worn high on the body and any prai worn at the same time would go round the waist.
A Superb Somdet Buddhist Amulet by Luang Phor Wan
Pure Buddhist amulets (without Prai materials) are known as Puttakhun magic and they work in a gentler way but still offer sustained magical force.
I offer a 30 days return policy with a refund on receipt of the item but for some items I cannot do that as they need blessing again by the maker, some of whom I do not know personally. This is a problem with spiritual items but I will always endeavor to help where I can.