We got a Quinny Buzz 3 wheeler, I didn't want it cos it seemed a bit style over function for me seeing as it is absolutely massive and only has about half a litre of carrying space for any shopping you do, the missus insisted, then also insisted on buying it new because "my baby's not a pikey so we're not buying secondhand stuff" That set us back about 600 quid with all the trimmings and the car seat.
It is actually OK, it is pretty easy to fold down/take wheels off etc when you need to get it in the boot, you need adaptors for the maxi cosi car seat so make sure you get those if you're buying secondhand, most mothercare shops have their display ones stolen as they take some getting hold of. Great for offroading, easy to steer, except on polished floors in supermarkets where the front wheels don't get any grip. Not too sure about the build quality as it seems a bit wobbly after 6 months use but maybe it was always like that cant remember…….and the thing comes with a puncture repair kit, not sure I can see my missus making effective use of that in a hurry