Save yourself some money and a lot of sneezing. If you have a blender just buy some Half Pint and Pint standard neck Mason jars. Unscrew the base of you blender off the pitcher, fill a mason, screw the base on, and BAM you have a great grinder with no fumes. Cofee grinders have vents to allow you to get that great aroma of coffee while grinding.....do you want that great aroma of pepper powder while grinding????
Seed removal is not in my book, but I have read some do it to get a finer powder since they don't always get finely ground. I turn the blender on high and walk away for 4-5 minutes, but some day I will have to try taking out the seeds first just for giggles.