Not as much an offer, but today I had:
Random player: "hi"
Myself: "Hello :)"
Player: "why you in the mine?"
Myself: "I'm looking for blue sapphires :)"
Player: "cool can i have all your other gems?"
Myself: "... No."
The player then followed me around a bit, had them muted. Honestly some people never cease to amaze with stupidity.
Other things I've had:
(When Turks were brand new on the map)
Player: wow i love your turk will you sell it?
Myself: I'm not sure I want to yet, but I'm glad I'm not the only one who likes him
Player: i can give you 2k?
Myself: Sorry, I'm really not ready to sell right now. And 2k would far too low if I was.
Player: why? i don't have more than 2k
Player: please can i have him i will never sell him?
Myself: ... -mutes-
(After catching a wild on Windy Pines)
Player: wow you are good at wilds
Myself: Thank you
Player: if you have any you don't want i'll take them
Myself: They're fine, thanks.
Player: but you have heaps!
Player: i at least want to know if you will sell your ASH
(And finally, on Jungle Isle)
Player: i love your paso. could i have him?
Myself: How much were you offering.
Player: i'm a non-sub so i can't give you anything...
Myself: Then I'm afraid I can't sell to you, sorry.
Player: you can still give him to me?
I just logged off