G'Day Lelsy and Dennis,
First, welcome to CF. You can usually get good advice here on a wide variety of subjects, but you can expedite that process a great deal by doing a couple of things:
First, it really helps if you fill out your profile with info about yourselves, things like where you are in teh world and what sort of boat you have and whether you are an old salt
or a dewy-eyed beginner. This info gives your responders a better chance of giving advice that is relevant to your situation.
And second, try to make your questions specific rather than general. the former has a good chance of success while the latter tends to generate "thread drift" and useless speculation and pontificating.
From your post I'd guess that what you are looking for is specific sites that deal in second hand boat bits... or maybe just online vendors in general... I really am not sure!
More specific queries, like perhaps "we need a 50 foot aluminum mast
and all the rigging
for it. Where is a good source?" will get some good feedback.
In general, marine hardware
is indeed less expensive in the States, but shipping
costs and the specter of having to return items if a problem arises has kept us from ordering many things. Small, light and high value items will overcome the downsides, and we have had those shipped in. There are reshipping agents in the states (one is MyUS.com) who will collect multiple items, repack them economically and then re-ship, often at better rates than you can get yourself. We've used their services and found them excellent and money
Well, enough rambling... again welcome and good luck with your restoration