@MinesALatte
We've got baby twins. And a DS12.
With DS, 99% of stuff was brand new. I actually shudder to think what we spent. We have tastes that are either "what a bargain, value buys" and "the absolute cream of the crop" and very little inbetween. We love value for money.
DS got everything. And whilst I was then able to resell it on and make a bit back, my god, it was not the way to do it.
The twins, have had 99% second hand. Bottles new. Enough mobiles, blankets, little cute bits, all new from relatives. I think I got them maybe 3 outfits each new. The rest has all been FB for sale. And I've saved thousands already. Designer matching nursery furniture. Found it, immaculate, for under 10% of the new cost. These fancy pants swing rocking things, £299 each new. £60 for both, from FB for sale. One still had the packaging on the bottom.
And more to the point, they're about to grow out of those swing things. I'll sell them for what I paid at least. And I love that. Essentially, they've cost us nil. I get so excited by this (it's my age dear
)
Our bugaboo donkey twin was a bit more. We got that new. But they'll have that for 3 years. So that's fine. Try looking at items as cost of ownership over the length of ownership. DH taught me this and it's completely changed how I purchase things.
Say a car costs £70k. You own it two years, but it's desirable and you sell it on for £65k. That's not an expensive car.
Buying a car for £25k, that doesn't hold value, that you sell after 2 years for £10k. Now that's expensive.
For the first year, they will go through clothes sizes so fast, you want to spend as little as possible. Again, on FB, I got some gorgeous Cavalli baby wear. Some sets had the prices still on the box. £288 new. (What the holy fuck?) And I got 7 sets for a tenner a set. I also bought generic bundles, of about 20 babygrows, again about a tenner a bundle. And I'll resell it all for the same.
Any baby toy that can be washed, I'll get for about 50p and whack through the dishwasher. I got LaMaze pram dangly toys (£17.99 each new) for £1 the pair. They went through the wash. Look brand new.
It's so much fun, honestly, and you'll start getting a real kick out of hunting down real value. Don't confuse cheap with rubbish. Yes, a lot of the cheap stuff is crap, so you have to look for the hidden gems, but ohhhh it's the way to go. DH has high 6 figure salary. He's so into my bargainous ways that he can't believe how much money we used to waste, and now, will leave work and nip out to collect said bargains for me 
And what you've saved from being smart, will take you, daddy and little one, on your first holiday!
Go forth and be bargainous 