Whilst I know some people object to posting specific deals from a sale for the rest of you that are heavy metal fans this is worth a look. Nice selection of Helloween albums cheap in the current sale at Play.com, links to the album list but the below albums are a steal.
Walls of Jericho - £4.99
Keepers Of The Seven Keys Pt. 1 - £2.99
Keepers Of The Seven Keys Pt. 2 - £4.99
These are also the 2006 reissues with bonus tracks, just ignore Pink Bubbles Go Ape :-)