Sale of a personal vehicle

Hello,  I am hoping someone might be able to answer my query.  It is 2022, (tax year) and I am selling a personal vehicle I have had for 50 years!  It is a collectible, but a daily driver.  How do I determine its basis?  Do I list what I paid for it in 1972?  Do I calculate all the repairs, etc. over 50 years and then subtract all that from the sale price?  I am not sure about the best approach, or if IRS allows those past items to be calculated to form a basis.  Or do they only allow what it cost me to actually sell the vehicle?  Thank you in advance for any respose.