Interestingly, it lists for $190 instead of the $150 it was a few days ago. I guess they are partially covering for their "losses" on their recent EOS-M price of $299 ... I bet a lot of Canon dslr users have bought the EOS-M at $299 and I bet they would all want to use their existing EF/EF-S lenses with their newly acquired EOS-M ... Best time for them to sell the adapter at a higher price ... Smart marketing... I am sure they will sell like hot cakes.
1. The retailers are not losing any money on the $299 deal. It was an instant rebate by Canon.
2. Some of us bought the M for use as a big sensor, pocketable point and shoot. Last thing we want is to slap on an adaptor, and then slap on a big hunk of glass and metal in front of that.
3. It would be dumb of these retailers to raise prices thinking people will beat down their doors to buy from THEM. There are plenty of alternatives (both Canon and 3rd party) on eBay, etc. that are still selling for $70-$100.