I have a couple of rarities up for sale on ebay, namely,
Deep Switch - self titled demo '85 (signed)
Deep Switch - Pigfeeder demo '85
Virtue - We Stand To Fight 7" (signed)
and also classic cumbrian thrash metal
Pendemia - Widespread Epidemic demo '88
you can find them all here...
Both Demos by Norwich based NWOBHM band Deep Switch
One is self titled 4 tracks
Other is "Pigfeeder" 2 track
Excellent stuff and much better than their only album release.