I see updates all the time that popular issues are going back for a second, even third printing sometime. I always wonder who actually buys them, assuming they're aware its a second printing??
If you're a collector, I can't imagine you want a second print in your run. If you just want to read that issue because you missed it, its so far after the initial pub date that you could have bought a digital copy.
If I miss an issue, and I can't find it at any of my LCS's, I'll go online for a copy before I'd consider getting a 2nd print copy.
Although one exception, I did buy the Obama (fourth printing!) issue of Amazing Spider-Man.