The folks at Shout Factory are about to release a Tom Lehrer boxed set that contains one CD and one DVD. If you're a Lehrer fan, you may have all or most of what's on the CD, though there appear to be a few obscure recordings on there. The DVD, however, looks like it'll be worth the price all by itself. I don't think any of these performances have ever been available on home video ever. Here's the link to pre-order. If you got one of those $25 credits from Amazon because they couldn't sell you all the Marvel Omnibus books for three dollars, this might be a peachy thing to use some of that money on.