Beacons are about 14k - 20k Plus this is a price check, I would like to advise to make a new thread named [Buying] Beacons Cheap!
Sometimes cheaper. A stack went at 10k a piece not too long ago. Looks like he restocked? https://empireminecraft.com/threads/beacons-10-8k-at-10959-nuff-said.67940/