Acorn Media are releasing the first series of First of the Summer Wine on dvd on 9th May
http://www.amazon.co.uk/First-Summer-Wine-One-DVD/dp/B004NP9NSI/
http://www.amazon.co.uk/First-Summer-Wine-One-DVD/dp/B004NP9NSI/
It's only being offered in Region 2 format.... :'(