NDJ wrote:

I’ve got a set of these but without the slipcase unfortunately. But in perfect unread condition.
What would be a good/normal price?
As I’m thinking about selling/trading them.

The price is really for the box-set not the books, for the 5 books without the slipcase, top end price would be €115 or £100.

Agree, it’s all about the slipcases/boxes in most cases.

Thanks guys. Will keep that in mind.
Thought they would be more valuable though.

NDJ wrote:

Thanks guys. Will keep that in mind.
Thought they would be more valuable though.

These are all very common books and easy to obtain, I'd keep them if I were you.