We recommend using either Kkmcn.com, Kontakt.io or Estimote beacons for best performance and price. They use the same chipset but package them differently. Kontakt.io beacons are plain and durable with a replaceable CC battery, while Estimote beacons are in a designer-made case and have a 3 year battery life. Beacon price depends on the number of beacons required and the features of the beacons, but are generally €6-€30 each.