Guild Publishing is a book club publisher, so yours is not a first edition, and is off very little value. You can spot book club editions by the lack of an ISBN (for modern books) and the presence of a CN number.

In good condition you might, if your lucky, get a few pounds for it, it's not collectiblt but someone may want to read it rather than collect it.

As its only 5p or 10 p to list a book it might make a good book to practice your listing skills on.