Viacom Rocking Out?

Viacom, the awesome media conglomerate it is, is apparently looking to sell Harmonix, the creator of Rock Band. Viacom have been performing well financially, but apparently Harmonix has been dragging them down a bit. Could it be people aren't willing to spend $150 just for one instrument now? Perhaps so as Rock Band 3 sales are said to be down. It'll be interesting to see who would be prepared to buy Harmonix out if Viacom IS looking to sell.