UPDATE 25 December : SOLD for 431GBP
http://cgi.ebay.co.uk/PRAIRIE-TANK-Std-Garden-Gauge-63-5mm-gauge-12v-electric_W0QQitemZ330387323506QQcmdZViewItemQQptZUK_Trains_Railway_Models?hash=item4cec9e7a72
Just spotted on Ebay, a GRS RTR GWR 45XX 2-6-2T appears to be in need of a little TLC but (currently) at a bargain price!
John.