interesting thread, i really dont think the bubble can burst on this sort of product - i dont think there is a bubble in the first place its just supply and demand. On my estimates every world cup that passes doubles the price of a unopened box of stickers (recent world cups - not so much euros) in terms of loose sets I tend to buy boxes at cheap prices in bulk and complete sets for future investment - much like you Alec - even £25 a set would double my money - though am not sure I want to sell! indeed forget your Isa's!!

I tend to ignore older more expenses sets and stick to Bulk! hence I am your man for lots of recent albums for swaps etc.