SHORT VERSION: Last open box / display unit - $81.96 minus 20% plus 8.25% sales tax. VERSION: I was looking to upgrade the center speaker on my HT, to match the Polk Monitor R50\'s recently purchased. My search focused on the CS1 and CS2, which use the same basic speakers and cabinet designs, and are supposed to be well matched. Fleabay deals for new / refurbs of both are running in the $100 and $150 range, and are ~$...