What would you expect the opposite of ?
I expect the opposite of a dearth of used Canon 135mm lenses hitting the market.
I'd expect quite a few people dropping their old and somehow instantly soft 135L's in favour of this new lens. Therefore there'll be lots of used lenses flooding the market. One of which I will be pleased to buy at a satisfactorily lower price.
Yes, exactly. If this is what you expect, then why did you say you expect a dearth? That is the exact opposite of what you describe here.