Having finally recovered from a bout of pneumonia lasting almost 6 weeks, I'm finally slogging through pages of the forum to play catch up!
On this topic, I've collected 7 of the 1960's Gold Key DS comics so far, as well as a few of the 1991 versions. The 1991 versions run around $4-6 ea. and the 1960's versions average about $25/ea. though the #1 edition is about double that. I get most of them on the NewKadia website, and they do weekly reductions on the comics--sometimes you can wait them out and get a pretty good price.