Originally posted by abacus07 I think it comes down to whether or not the OP is going to use it or not. For me I wouldn't use it that much since most of my photos are outdoor landscapes and it's too heavy for traveling (compared to a 28/2.8). What the money is going to be used for isn't as important.
I guess that was my point.
Here's a silly example: If someone offered me a brand new Porsche 911 worth 100,000 for 50,000, I would obviously buy it in a heartbeat; it's a great deal. But at the end of the day I don't really
need a Porsche, so I would likely sell it. Would I ever expect to be able to find another brand new Porsche like that for 50,000? Of course not. But I would prefer to take the net 50,000 from selling it and buy myself a new Volvo station wagon, which I could actually make better use of.
Bottom line, if the OP would make good use of the 28/2, then by all means he should keep it. But if he would rather have something else (whether that's a partial payment to a newer body or another lens altogether), there's no good reason not to sell it and get what he wants. The fact that he won't be able to find another outstanding deal on a 28/2 down the road isn't relevant unless he sells this one for way below market price
and then changes his mind and re-buys one for a lot more money than he sold this one for.