Take it from someone who sold a bunch of stuff in spring, and just recently re-bought most of it...
DON'T DO IT..... if you are thinking of finding another one.
Fortunately, a couple of the buyers took sympathy and sent me the items back, for what they paid.
In a couple cases, I had to re-buy the item, at higher price and slightly not as nice condition.
If you are thinking of "taking profit", then, of course, sell. But you will discover that it is hard to find another one, and it will certainly be more expensive. And this is especially so, for lenses right now.
....Vick