This isn't an issolated incident with canon glass - I suspect Canon mark it up, and then some shops mark it back down again (or ship grey imports which I'm totally fine with). When I was after the 55mm 1.8 prime every single one (and there were perhaps 3 a day in the UK) was >60+postage. In then end got one new for 55 all in! (and these were all the MkII version - the MKI does go higher as it's barrel is metal).

Ian