“Just goes to show you that cheap isn't always the answer.”
Definitely you need also the quality of the filament not only the price. I also read somewhere here (in the forum) about ebay filaments; it’s crappy and with zero strength which easily breaks apart like fiberglass. Good thing I never tried ordering at ebay. This is a good warning. I’ll just stick to 3D2print for my 3D printing filament supplies.