I scored the spanish version for $8 or $9 in November. If your BB has a 75% Manager's Special bin, be on the lookout for it (as well as the old english version). If they were in the bin, they are more than likely all gone now at that great price (due to Xmas). I remember seeing them in October but passed them up then. I think that's when most BB's started putting them on some sort of clearance (either Manager's Specials or a markdown because the new version was out).
Also, good job MS by only including 1 mic with Lips:NOH! And you wonder why people are ripping you a new one in your own forums and others?
As noted, the Spanish verison varies a bit (some english songs taken off, replaced by latin songs).
I was going to grab it anyway for the mics, but then I noticed Kylie Minogue's Love At First Sight and Morcheeba's Rome Wasn't Built In A Day on there (songs you can only get in the U.S. by buying this version) as well as Earth Wind and Fire's Let's Groove and Ace of Base's The Sign (which is only DLC on XBL in the U.S.). Had to grab it! Sold the mics to 2 friends for $20 a piece and kept the disc.
$19.99 is still a great price (mics alone are worth about $25 a piece).