I bought my stroller and carseat at probably 2 months or so. It felt pretty early. I also got a bunch of stuff from a friend of mine at maybe 4 months. Buying things early can definitely make you feel better, but it's sometimes better to wait it out and really think things through. But I suppose it does save time. I don't regret buying anything.
most of the stuff I got was for free from my mom ..she give me a crib &some other things & some clothes! just the second she found I was having a baby ! I personally havent bought my baby much Just 5 little clothes hehe makes me feel bad sometimes