Ideally, folks who buy would want as many receipts as you'd be willing to provide as it removes guesswork on what's been done. That said, receipts are not a deal killer at all in my opinion.
If I were buying your car, I'd take the time to have a long conversation with you about the car. Any buyer who is paying attention quickly starts to see what doesn't quite add up. I do this with cars I sell and at some point, the buyer is absolutely satisfied that you are not trying to pull the wool over their eyes.
To be honest, you could probably not provide any receipts and still have no issues selling the car. If they thoroughly check out the car, talk to you in detail about it, and if it's priced fairly, it will sell with or without receipts.
Buyers will definitely want all license plates, title, fender tags, build sheets, old documentation, etc.