Gay Bob Doll Magazine Advert, 1978
From the "Vintage Ads" feed on Livejournal. i suspect these fetch a pretty penny on eBay etc. these days.
Edit: Here's one on offer on eBay for 34.99: cgi.ebay.com/1977-Gay-Bob-Doll-his-closet-Original-Box-/1...
In 2010 dollars, Gay Bob would have cost $65.41 (calculation courtesy of www.usinflationcalculator.com/). So, $34.99 doesn't seem like such a bad deal.