Hi,
I have a Arsenal toilet tile from Highbury that is up for sale on Ebay. These went for £200 in the auction so they are pretty valuable.
http://cgi.ebay.co.uk/Arsenal-Stadium-Highbury-Badge-Crest-Wall-Tile-RARE_W0QQitemZ280605362599QQcategoryZ2885QQcmdZViewItemQQ_trksidZp5197.m7QQ_trkparmsZalgo%3DLVI%26itu%3DUCI%26otn%3D1%26po%3DLVI%26ps%3D63%26clkid%3D5715600537582510611#ht_500wt_1156
Hope it goes to someone who will appreciate it rather than me having it sitting in a drawer somewhere.
Cheers.