biking no, never had a mouldy packet, or heard of one, interesting! They do have quite a short sell by date, and a relatively short once-open-use-by date, so I wouldn't by tons and tons in advance.
Re pram- we just used a sling for first 9-12 months, then borrowed various to try. Bought a MacLaren quest which wore out quickly, then a micralite super light which I love love love. You can get a carry cot for it, and maxi cosy adaptors, but obvs we didn't need those by then. It is tiny, light, big strong wheels which make for easy pushing on all terrains, comfy (I am told by DS), about 200 quid. The fold is second to none- you can leave your crap in the basket! And the big back wheels pop off to make it even more compact- we can get it into the overhead luggage compartments on virgin trains, which are notoriously too small to be much use. It is not your traditional travel system, but we didn't want that, and it is heaven for a small upstairs flat, and a lifestyle involving loads of walking and public transport.