When I was setting up my website I consulted with a lawyer on 27 USC § 203, the post prohibition law governing wine and spirits. The result was he felt that A)the law only applies to licensed dealers, and people illegally in the business
of ******* wines and spirits without a licenses, and B) people involved in interstate commerce. What we took this to mean is that as long as you aren't ******* alcohol as a business the law doesn't apply to you, and if you're still concerned you can simply restrict your dealings to other people in your own state (so long as you abide by the laws of that state).
If you have any questions or anything don't hesitate to PM me or email me at firstname.lastname@example.org