Yeah, they always lowball you. Never accept their first offer.
You have to negotiate a settlement with them. They won't let you know that you can though.
Best tactic, tell them you want to see how they arrived at their figure. They'll do some song and dance about figuring market value based on what the bikes are selling for combined with bank values, etc.
Ask where the bike that is comparable to yours that you can buy for 4,000 dollars is so you can buy it.
They'll raise their offer just to get rid of you. Of course like Ron says, don't expect too much. It is six years old.