If it is a small item, you have a world market via airmail.
European and Asian audio nuts are not as cheap as US bottom trawlers, especially DIYers. Nobody is as cheap as us!
My two friends who are German tonearm builders sell a lot of expensive handmade tonearms. It took them years to get where they are but sales are good. If you could build something like the old wood 12" broadcast arms and sell direct for $300-400, you would sell a bunch.
One thing that nobody is mentioning here is that it can take years to get established in any audio business, and usually does. Best plan is to identify a lively niche, get in there and stay in. Pick something super classic with worldwide lasting appeal.
I'd suggest parts and accessories over complete speakers, which might be one of the hardest things to sell sight unseen\heard.
If you need wood cut I have a very good table saw.
Might have to take you up on that, Tom! I need "wings" for a baffle with an angle cut, so two 4' pieces ripped lengthwise at 45 deg would do it. These are for some GIP woofers modeled on the WE TA-4181. Monstrous woofers that I need to get into service.