I would agree with Parties (again :o) that perhaps your best option would be to buy a new car seat and look out for a used pushchair.
I bought all new for my first and this time round with DC2 I managed to pick up a proper traditional pram that suits our lifestyle with chassis, reversible seat unit, raincover, footmuff and proper carrycot for £80 on our local FB selling page so it's definitely worth a look!
Also agree that it would be an idea to think about your needs with the pushchair, the main questions you have to ask yourself are:
- What is your maximum budget?
Once this is sorted it helps you to narrow down your options a bit but remember you don't have to spend a fortune if you can't afford to, your baby will be fine in a £50 forward facing pushchair if that's all you can buy!
- Do you have storage in the car boot/house to keep a large pushchair or would small be better?
There is no point in buying a massive pushchair if you have nowhere to keep it!
- Do you walk lots or will car/public transport be your main mode of getting about?
Big air wheels are good for walking lots on any terrain but pushchairs with smaller wheels generally have a smaller footprint which is ideal for buses or chucking in the car boot equally something easy to fold is a must.
- What type of access do you have to your home, will you need to get up stairs with pushchair or are you able to walk straight in?
Again something lightweight and easy to fold is handy if you have to lug it up stairs unless you want to bump it up on wheels.
- A lie flat seat/carrycot is definitely better for baby but a car seat that clips on can be handy every now and again, will you use this function?
Please do remember though that babies should not be left in a car seat for longer than a few hours as it is not good for their spinal development and can cause breathing issues if they are left too long.
Sorry that seemed so epic but it really is something that if you do your research and sort out what you need then you will spend less in the long run :)