Booked AA ticket on AY 5 Jan 9 2020. Business had 7 seats open according to EF seat map. Economy was half full. No upgrades available when calling support or their online options due to AA ticket. Airport desk was able to price me an upgrade at €500. Compared to other posts in forum seems a bit high. Asked pricing agent she said the pricing is set for the day and depends on how full economy is. Upgrade is cheaper when economy is more full.