Philips had (it still has nowadays) its own Philips store in Eindhoven, where they sold a wide collection of CD-i discs. In our area, CD-i discs were sold by Free Record Shop, Van Leest and of course Super Club. But the largest collection was available in the 'Personeelswinkel', although that store was only open for internal Philips employees. Nowadays it is called 'MyShop', but it is still located inside the PSV soccer stadium, as it was during the CD-i era. I've never seen a bigger place where they sold CD-i discs. Our local Free Record Shop and Van Leest both had a couple of shelves full of CD-i games and Video CD's. Our local Super Club (owned by Philips) had a wider catalogue available, filling up several shelves just for CD-i. But the Philips Personeelswinkel was the best place for CD-i: I've seen several CD-i titles that were not generally sold somewhere else and sometimes even USA imports showed up. Where did you buy your CD-i titles?
[Thanks, Fons]