You'll need to put some effort into straightening the fork to sell it as whole, and maybe learn something in the process, or sell it as is or for parts. Most times I've found there is not much profit to be made unless you add value by either repairing something that is damaged, or adding some hard to find correct parts that are missing to the project. Most times good bikes aren't cheap and cheap bikes aren't good. I've also found that most old bikes that didn't get completely destroyed or scrapped got taken out of service because of some significant damage that affected the way they rode. Oftentimes this is not immediately apparent in the heat of the buying moment. I have an internal checklist that I am constanly updating on things to look for when buying so I don't overpay.