Just be aware that if you get a big bundle, you may pay a lot in postage, and it may contain a few 'fakes'. Some of these work well, and some don't.
How old is your GC?
40 years ago, we asked GPs for small boxes of Duplo and Brio. They were a bit bothered that the tiny boxes looked 'mean'. We reassured them that a 1 year old would be quite happy and they, also aunts & uncles, could add as he grew. They did.
Those collections are now huge, and 4 children + 2 older grandchildren later are still in use in our house, and being passed on to the newer GCs.