Take a look here - lists most Pentax lenses plus rough estimate of cost and score out of 10.

Faststone does it (just tried)

I hope you declared all those Ebay profits to the taxman, they have a nasty habit of coming back at you when least expected

Have fun with the new kit.

I wish SRS would hurry up and sell out of their current stock, no matter what I tell myself I am still thinking of buying one while they are at the lower price and selling on my Sigma 70-200mm f2.8.

You mean like Canon gear?

Ah thats ok then, thought you were talking about the outside element

I think the 16-50mm is a cracking lens but mine still steamed up at Marwell last week. I think every lens will unless you take precautions before going in.

I still have a brand new boxed M42 55mm version of the same Vivitar, bought it off a woman in the USA whos father used to be a press photographer in the Whitehouse. She had it on an Ebay auction but I emailed her to see if she would sell it as a BIN and she said yes but as it was quite expensive originally she wouldn't accept less than $50 .. and that was when the exchange rate was 2:1.

There is a good chance my Vivitar 100mm f2.8 A mount macro is going in the next couple of days .. and I said I would never get rid of it ..

Theres an insect in your Tamron 80-200mm f2.8?

I sold the exact same Vivitar macro on Ebay a couple of weeks ago but it was a M42 mount which fetched £147 plus postage to a buyer in Australia so that should give you an idea on what yours may do.

On here or private Ebay sale?