What is the price range for a decent 1986 honda cb450 nighthawk?

Looking for an older Nighthawk but I know nothing when it comes to pricing, found one that needs the gas tank cleaned and lined for $900, and not sure if good or bad deal.

The rest of the bike should be in excellent condition or youre wasting your money as the rust inside the tank goes further inside places that are just another problem.

If it has rust in the tank it has rust elsewhere you just can't see.

A rusted tank can be professionally sealed by a radiator repair shop for about $90
I would check the bike over thoroughly before purchasing it.
Check if the spark plugs are firing.
Do a compression test on each cylinder.
If the battery is dead and you can't perform these tests, use a car battery as a jumper battery (car not running).
A lot of the parts are no longer available for that bike.
Look at an online parts store like "bikebandit" and see for yourself what's available.
Be prepared to go on a scavenger hunt trying to find parts for that bike.

That vintage running is a dollar a cc plus $100.00 with bald tires- so $550.00 with another couple hundred for tires, brake service to be added. Not running and fuel tank said to need cleaning? Add carb cleaning to that, fuel petcock and filters- another $100.00 and offer 1/2 that asking price if good, recent tires. Non running, 30 years old, needs some work--and not a Harley- maybe .50 a cc for complete so top of $225.00. Mid season, for sale sign at Sunday morning breakfast meet with speeding ticket to show tops speed that vintage up to 500cc- $2.00 cc plus $100.00 is good for dickering- $900.00 would be acceptable then, BUT- the way you described it the bike is not if good seasonable running condition.

Well be careful because sometimes the seller says "oh all it needs is the gas tank cleaned and lined" but when you do it you still have issues. Those bikes run around $1500 however I would suggest the Suzuki Katana sport bike and here is why. See the review below on video but you can get a bike like that for about the same price and it has a windscreen and a better seating position and plus the Katana is a better bike. Oh also it has more power. A 450 is gutless when it comes to power.