Is the Fender Blues Deluxe Harmonica in A a good first harmonica?

The key is the important bit here: this is the A version. If your tutor or learning material specifies a different key, choose that instead so you can play along without the mismatch.

At £16 new, it is a modest outlay for trying harmonica. The supplied information does not establish its tuning accuracy, playing response or durability, though, so price alone is not enough to judge its quality.

If you are comparing buying options, the Best-value used saxophones and wind instruments list is a relevant broader resource, rather than a guaranteed source of direct alternatives. For a used harmonica, check cleanliness and condition carefully before committing.