I haven't even got the excuse that we were buying ahead - definitely need buggyaddicts anonymous.
First one was a travel system that my mum bought us. Cost way too much and was so bulky that we only really used it for the first few months - as soon as you wanted to go on a bus or in a car it was useless!
Second one was a Graco Citisport - very good pushchair, lighter and did get a lot of use. Wasn't easy to fold though and didn't fold very small.
When we got the Micra, found that we could only fit the pushchair in the boot and nothing else would fit so went to Mothercare and bought their cheapest umbrella fold (about 15 quid I think) without really looking at it to keep in the car.
Discovered after first use that cheapest meant the wheels at the front didn't swivel!!!! Abandoned that one at my mother's house as an emergency pushchair and bought a 25 quid one from Mothercare instead.
That lasted us a while, but once we'd moved and were using it as a main pushchair rather than a "now and then when we're out in the car" pushchair, it took a hammering and all its flaws became apparent (not very comfortable for ds, had a list to one side - so much so that my left shoulder would ache for days after using it). I'd had my eye on a Volo and when the Mothercare one's folding mechanism went kablooie I took it as a sign from God that we needed to buy the Volo
Ds is only 2.5 years old... sigh