I'm a wine snob... But after flying in to an amazing hotel in a twin engine helicopter and the sommelier witnessing the fact, then suggesting a wine I'd enjoy tasting rather than just paying for, I am converted to taste over price.
Only the other month on my journey home from Le Mans, via Spain. I ended up in a supermarket where I brought Rioja at €1 a bottle. So I bought 8 bottles, thinking they would be awful, but worth a go.
I can tell you that each and every one of them, whilst varying mildly in quality, were on par with anything from these bulk sellers.
My advice; rent a transit van, get a ferry to Santander, go to the nearest super market, fill the van up the a grands worth of wine and save yourself a fortune.
Probably best to do it before October 31st