I've bought this lot of used Empro shunts almost accidentally a while ago, however I don't need that many. A similar new shunt is around £20, I will sell these for £8 each + postage (£4 in the UK, £10 to most European countries) . These are 1mOhm 50A max, 30A continuous current, originally 0.25% tolerance, however my measurements at 1A DC result in about 0.4% max deviation, mostly 0.3% or less.
Alex