Bargain beads are high quality microspheres that might represent overstocks, overruns, or a non-standard color, size, etc. that doesn't quite fit in our standard product listing. Our affinity ligand-coated products are added to the list when they reach 18 months of age; but not to worry--with these, you will always be guaranteed an additional 6 months' shelf life from the date of shipment. To see our entire stock, click here