The site looks a bit dodgy with all the different prices listed for the same wine, but it's based on burnt 'investors' willing to sell their wine at different fixed prices. You just have to find the cheapest one listed and enter the number of bottles. The system will tell you if it can be supplied.
If not just give them a call, very nice lady Leisa will help out.
Regards
zip
p.s. I am in no way affiliated with this site and don't own any shares of it :)
AGS Price at posting:
0.0¢ Sentiment: Buy Disclosure: Held