Analysis of information sources in references of the Wikipedia article "List of most expensive association football transfers" in English language version.
The Aston Villa had decided to give them £100 cash down and to play Small Heath a match on September 1st, probably at Perry Barr. They had guaranteed no less a sum that £250 from this, and Small Heath were also to have half any amount taken in excess of the guarantee. This would mean a gain to Small Heath of about £500. Wheldon was having £150 a year, and he (the chairman) understood his wages with Aston Villa would be considerably in advance of that amount.
The compensation cost to Chelsea is understood to be £20 million for their new head coach Potter and a further £2 million for the five-strong backroom team that have gone with him.