I checked 10 online dealers today and only 4 had 2011 Pandas available for sale at prices that seem to have have recently jumped up a fair amount. 1. $63.50 + s&h 2. $62.00 + s&h 3. $59.95 + s&h 4. $49.00 (Free s&h) Sales on the bay are running in the low $50s. For a mintage of 6,000,000 these are seemingly pretty scarce and pricey.
Probably spiked up due to some people tired of waiting for 2012 Silver Pandas. I'd advise against paying $50+ for a 2011 1oz Silver Panda.