What should I offer for this bike ??

[The Spaceman_imp]

Since its not Ack's bike anymore, I don't feel like it hurts to tell you he had a heck of a time with corrosion on the bike. He kept it indoors at first, but then had to store it outdoors. In spite of his best efforts, it wound up with damage.

Unless you can buy it at a substantial discount you might want to look for a cleaner example.