When we lived near St Albans there was a wonderful shop called "Outgrown" that sold baby/child stuff. I equipped both my children with everything (clothing, pram, pushchair, toys ....), and sometimes I'd even sell things back to them. I know that rents round here are extortionate, but I'm sure that people would beat a path to the door if someone opened a similar shop round here, even if it had to be in an out-of-the-way (and cheaper) position.