1988 - Conan Portfolio by Bart Sears Portfolio

http://comics.ha.com/c/item.zx?saleNo=12061&lotNo=31359

1982 - Ka-Zar Portfolio by Brent Anderson

1983 - Ka-Zar Portfolio Ad

From Amazing Heroes #29:

1981 - Moon Knight portfolio ad

Here's an ad (and cover) for Bill Sienkiewicz's Moon Knight portfolio:

Some of the portfolio pages can be found in my earlier blog posting here:
http://marvel1980s.blogspot.ca/2010/06/1981-bill-sienkiewicz-moon-knight.html

1985 - Ken Stacy Portfolio II

From Marvel Fanfare #23:

1988 - Red Sonja Portfolio plate #3

By Jackson Guice.

http://www.coollinesartwork.com/GalleryPiece.asp?Piece=289281&ArtistId=400&Details=1&From=Room

1989 - Punisher portfolio Two

Published by EDITION DEESSE, this portfolio had a run of 2000 copies. The first plate was signed. Size was 12" x 16". This portfolio also included a photo of Mike Zeck in gun-toting "action" pose with mirrored shades.

And if I'm not mistaken, in this print, the Punisher has his hands on the artist, Mike Zeck!