I think that the point in undertaking a buy a brick scheme is that it should be available to all supporters. By setting the price too high it would price some people out of the scheme and would maybe seem as though it was being set up for the more "well off" supporters. If you set the price reasonably low people can buy more than one and everyone can get in on it without feeling as though they are being priced out .
?20 seems to be a much better price than anything higher, 2000 ?20- ?25 bricks sold would give ?40,000 - ?50,000 and be a massive boost to the ground developement funds (although there would obviously be the price of buying the bricks to come off that).
No one likes us, no one likes us, no one likes us, we don`t care !