I have 4 and another on the wayand this is what i buy
clothes,too many!sleepsuits,bodysuits,cardies,hats,blankets,socks.
Use resusable nappies and wipes
I breastfeed so lanolin cream breast pads and a few nursing bras
pushchair,i have a double out and about nipper for dd who is 3 and ds who is 9 months so this one will go into that.
car seat,i have a britax one that can be used from birth to 4 yrs it looks really comfy,some people like one that attatches to a pushchair though and its no good for that.
stuff for home birth,big black cheapoants to throw away after use,loads of pads.
bouncer,playmat,some soft toys?
A sling,although dh uses ours mor ethan me,i don find them comfy and ive tried them all.