"I asked 'Aishah about that and she said: 'The Messenger of Allah got married (and married his daughters) for twelve Uqiyah and a Nashsh'" which is five hundred Dirhams. (Using translation from Nasāʾī 3347)  

«فَعَلَ رَسُولُ اللهِ ﷺ عَلَى اثْنَتَيْ عَشْرَةَ أُوقِيَّةً وَنَشٍّ وَذَلِكَ خَمْسُمِائَةٍ دِرْهَمٍ»