I don't keep up on prices in Europe but their prices tend to run higher than here in the US. My guess is the asking price is fair for a bass located in the UK.
For the Series II it looks to be a bit high for the condition. I suspect it is include but the seller doesn't mention if the DS-5 included. As an aside I use to live in Los Banos in the early 90's. I miss the Wool Growers Association hotel dining room. When we lived there the kitchen was run by three Basque women who, if you sat close enough to the kitchen, you could hear whistling folk tunes in three part harmonies. The food wasn't bad either. With the exception of the entree everything was all you can eat and the meal included the house wine served in reused bottles.