If any posters were "safe investments", it would have to be SW. I can't see them going down. There's just too much of a wide audience / following.
Enki, get your credit card ready! 
I need to remember to contact HA tomorrow morning to verify their CC policy. According to their website, they don't accept them, but many people here said they do. I want to confirm before bidding
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There were numerous ones I was watching, and last night they were sitting right around the low end of the "average" prior selling prices, so I was hoping to get 2-3 for a moderate price. But tonight they just jumped to crazy levels. I wanted the Birthday, but assuming I could actually get it for the next bid amount, that would be $2629 (inc fees). That's $400+ more then the top prior price of a similar example and condition, with the average being $1500-2200. Not gonna happen. The Chaykin is another nice one, and one I need, but it too is over average prices (though just slightly). It's signed, which MIGHT make it more valuable, but that's not a big deal for me.
There are a few other ones I might pull the trigger on that are reasonable, but who knows what will happen between now and tomorrow. Also, I was hoping to pick up a more rare poster that I can't find multiple times a year.
That Concert poster is calling me..... The Banner would also look awesome in my office.....
Better call my bank.
