I find that Markham's cabernet is pretty good (usually has a nice buttery finish/texture) and is a pretty good value at $18. Penfolds Bin 202 (I think that's the bin # but am not 100% sure) is a really nice shiraz that's usually priced in the low $20's in the stores.

I also try to find wines that aren't sexy right now - Spanish reds, Chilean cabs, and New Zealand pinot noirs are all quite good and severely underpriced all because they're not hip. I also think that South African rieslings tend to be ignored as well for some reason.

I also like to look for hidden gems in a bad vintage. For example, 1998 is rather infamous for being terrible in California because of El Nino. Well, this is generally the case BUT there are a few standouts that are priced down because they have the stigma of being a '98. The one catch is that you need to buy those wines before Wine Dictator starts publicizing what turned out good. For example, Cain Five 1998 is quite excellent but was initially priced down by about 35% because of the vintage stigma. Wine Dictator decided to trump it up as an exception to El Nino and, bam, the prices shot up. Stuff like that.

And yes...Two Buck Chuck is perhaps the best deal out there. I try to bring back cases from Cali whenever I'm out there on business.