Complex sentence: Smartmedia memory cards are no longer manufactured, old stocks of new 128mb can be obtained from specialist suppliers while supplies last but are disappearing fast and as demand is still quite high for these cards, the prices are rising.
Split into simpler sentences: SmartMedia memory cards are no longer manufactured, though old stocks of new 128MB cards can be obtained from specialist suppliers while their supplies last. As demand is still quite high for these cards, the prices are rising.