I came ahold of this magazine Cavallino - edition February/March 1988 no.43
It did had this market guide which I scanned. Interesting to see how the 365 GT4 2+2 and the 400
was perceived back then, and their price tag. If you didn't know yet, you can click on the pictures to enlarge them. But in this case maybe it's better to save it locally and view it.