Bagpunk, it's hard for another person to make the decision for you. It depends on your personality & how much love you have for this Fall 05 Stam. Will you lose sleep if you cannot find the exact item again? If the glue marks can be removed by your local repair shop, will you be willing to pay additional cost (in additional to fixing the frame)? If the marks cannot be removed, would they bother you in the long run?
There are times where I keep bags that aren't perfect, I am sure there are members who are like me as well. Why? I lost my chance of owning a Spring 06 Blush Elise because I over-inspected & wanted everything to be absolutely perfect; I ordered Blush Elise twice from NM online, I sent them both back. I never stop beating myself up for that!!!
If you start comparing to other bags, it shows that you already have doubts about this Stam (your inner self wants you to send it back). All premium brands sometimes have issues that need some repairs, unfortunately, you have to eat up the cost when it's purchased from ebay. Fall 05 Stams are known to have some problems (not supposed to, but what can we do?), some lucky owners don't have any problems with theirs. As for Kimmisu's Taupe Stam, I believe that it's not brand-new like yours, it's not quite apple-to-apple. Kimmisu, correct me if I'm wrong. =) I really hope that her Fall 05 Stam will be perfect too.