Henry de Kerswall of co. Stafford appeared in Court and complained, that whereas he had come into Court to execute a certain fine, one Ralph de Stafford Chivaler, Humfrey Hastang, William de Burton, Simon le Budel of Maydenele and Adam de Whylok, with malice aforethought, had insulted, beaten and ill-treated him in the Court in the presence of the Justices, and the Criers of the Court were immediately ordered to attach them, and the said Simon was taken by the criers and apprentices of the Court, (per proclamatores et apprenticios de Curiâ), when attempting to escape, and was brought to the bar of the Court armed with an aketun and a sword in a scabbard and a buckler. And the said Henry stated that when he had come to the Court to execute a certain fine, the said Simon, with others, on this instant, viz., on the Monday the Feast of St. Martin in the Great Hall of Westminster in the presence of the Justices sitting there, vi et armis, viz., with swords and daggers drawn, and with bucklers taken up and extended (et cum boclariis arreptis et extentis) had beaten, wounded and maltreated him, in manifest contempt of the King and his Court, and to the damage to the said Henry of £2,000. Simon denied the trespass and injury and appealed to a jury, and a jury elected by consent of the parties stated on oath that the said Simon was guilty and assessed the damages of Henry at £100. The said Simon was therefore committed to gaol and was delivered to Richard de Kenbrok, the locum tenens of the Constable of the Tower of London to be detained there in irons, at the will of the King, and his aketun, sword and buckler were forfeited to the King and were appraised at 3s. 4d. And upon this Luke de Burgh, the King's attorney, stated that certain other malefactors had committed the same transgression and he stated that one Hugh de Whitchurch of co. Salop, deputed by Edmund the custos of this Palace and others unknown, knowing that the said Simon and others had committed the above transgression, and with the intent to help the said Ralph and the others so that they might escape, had opened with their keys the doors of the Palace and had admitted them into chambers from which they had subsequently escaped, and he prayed that the matter might be enquired into by a jury, and a jury being sworn presented that the said Ralph Humfrey, William de Burton and Adam had committed the above transgression together with the said Simon, and that the said Hugh de Whitchurch, the deputy of the custos of the Palace, had knowingly opened the doors of a chamber in the Palace and shut them up in it, so that they might escape and the said Hugh being present in Court and questioned, etc., stated he was not guilty and appealed to a jury, and a jury elected by consent of both parties, stated on their oath that the sald Hugh was not guilty. He was therefore acquitted and the Sheriff of co. Stafford was commanded to attach the said Ralph, Humfrey, William, and Adam, and produce them at the Octaves of Hillary to answer to the King for the said contempt. m. 348.
From: 'Plea Rolls for Staffordshire: 5 Edward III', Staffordshire Historical Collections, vol. 11 (1890), pp. 21-35.
3 shillings and 4 pence = 40 pence.
An archer was paid 3 or 6 pence a day whilst on campaign at this time, depending on whether they were on foot or mounted. Later in the Hundred Years War archers were more frequently paid 6 pence per day.
Obviously the quality and condition of the sword, buckler and aketon in question would change the value, but I think this is an interesting example anyway and shows that the arms and armour of a soldier like an English archer was not necessarily what we would consider cheap, but it was not very expenive either - say a couple of week's pay.