Personally, I would err on the side of selling it as is. From my experience, you are not usually able to recuperate the full cost of the repairs in the sale price. It will actually make you more invested in the truck and make it more difficult, emotionally, to get rid of it.
And if it doesn't sell? Then you're stuck with an additional cost. So you're better off assuming you won't get full asking price for it.
In my opinion, the buyers will try and find issues to lowball you no matter what you do. That's the nature of the beast.The only way to prevent that is to be upfront. Show that you have done your due diligence and are being fair. I would:
1. Finalize what you think the true value of the truck is. I use 4 sites typically: KBB, Edmunds, Craigslist and AutoTrader. The average of KBB and Edmunds would be a fair price I think.
2. Call a mechanic or two and ask how much fixing those items would cost.
3. Write an ad where you state your reasons for selling the truck. Eg. got another vehicle, need the space etc.
I would also provide any paperwork you have had from previous work done to it. As a buyer, this builds confidence, and tells people that they are dealing with somebody who doesn't have anything to hide. You are selling your trustworthiness as much as your car. Other top things I look at when comparing used vehicles and that can help you make your ad better are:
* Is the title clean? Any liens on it?
* How many owners has it had?
* Why are they selling the car?
* Mileage
* Paperwork
* Any issues e.g leaks?
* Amenities
4. I would state in the ad that there a couple of issues that you have gotten estimates from x number of mechanics. You don't have the time to fix them but you are deducing them from the fair value of the truck.
5. With regards to people calling you afterwards ...I always have people sign a sold-as-is statement when selling a used vehicle. There are plenty of templates online. I then go over it after they have checked out the vehicle and filled out the title transfer. Have not had a person call me back so far.
When I decide that it's time to part with the vehicle, I don't want to waste any more time on it. I want to sell it and use that money in ways that make more money :).
Hope this helps.