Not sure if this is of interest to anyone or not, but on Monday the wife and I drove down to Slavyantsi Vineyard, around 30 minutes from here, and then on another five minutes to Sungulari to their 'retail outlet'.
They have a great selection of wines in bottle, bag in box and on Vrac (take your own bottles and they will fill them up for you).
We opted for a rather nice Misket and a very good Cabernet Sauvignon which come in 10 litre 'bag in box'. We've sampled the red and the white and both are very drinkable for the price (22 leva for 10 litres).
At 2.20 leva per litre = 1.65 leva for 75 cl ... this makes it around 75 pence for a bottle of wine at today's exchange rate!
Easy drive from Yambol/Elhovo area and from Bourgas Area ... plus what you spend on the petrol/diesel you can easily save on the wine!
Cheers
Chris