Maybe try to post some sample wine you can offer to buy for your client here and also indicate the estimated price on each bottle plus shipping. This is a good business idea if you can give the lowest possible price in the market. I'm planning to build wine cellars and stock some quality wine so that I can drink it in the future with my kid.
I hope that you are still on this business.
or even do other stuff besides wine. I've been eyeing something like hennessy paradis magnum or
https://www.vinsgrandscrus.com/cognac-hennessy-timeless-bouteille-70-cl.html even (I can't see myself getting this anytime soon, but I can dream)