They are definitely going up in value, I managed to pick up a 1 owner from new Orion L with 54k on the clock for extremely good money about 1.5/2 years ago and the week after, their value just seemed to have sky rocketed since! Even the base model like mine is shooting up in price which is great! Saying that, mine is now full Ghia spec with electric windows, electric side mirrors, central locking, trip computer even put in an electric sunroof!
Mine is more of a project car though - zetec turbo etc etc and like yourself, definitely didnt buy to sell!
Would love to see more pictures of your cars!