70 K20 troubles

[garret hakkleberry]

Hello guys I'm new to the whole car thing as I'm under 18 and need some advice I have a 1970 k20 I bought 3 years ago and the cab was toast and I was told to just scrap the cab so I did and bought a 70 GMC with a cab that was great for maine to put the cab on the Chevy I havent touched weither truck in a little bit and tried to sell it but everyone wants the Chevy cab and keeps lowballing me so I'm wondering if I should put some more money into and drive it or fix it and sell it just wondering if I'm missing out