Good advise Stefan but not if you want that special rare plant. So many from China sells seeds of plants that are photo shopped and show super colorful plants that don't exist. Best you will get is common seeds or worse weed seeds. One super way to know is the super cheap price for a large number of seeds. Most from China is a rip off. 20 years ago, I purchased some rare seeds from a China grower and got them. Variegated Clivia for $1 a seed. They came inside a stuffed toy. Was told to look inside of toy. Almost every seed germinated. Never ever got that lucky again. It is just like gambling, Hit it big once and it hooks you to keep trying again and again. If you can find what your looking for at a garden center, What a great joy that is.
