I have an acct that is 1 year old has 3000+ link karma and 500+ comment karma. I'm not sure I am willing to sell it yet but it really depends on your offer.
Same, mine is 6 months old and has +3100 karma but I would only sell it if I get offered a good price. Send me a pm with your offer OP.
I'm interested and it would be nice if you could post some kind of rates you'd generally offer for an account, thanks.