Should sellers "fix things" before putting their house up for sale?

Not long ago,  I was contacted by a homeowner asking me if it was  a good idea that he repairs broken things in the house before proceeding with the sale or  is it a better idea to leave it to the buyer to do the inspections and only then he repairs the items that the buyers  ask for. 
Let's call them scenario 1 and 2. 
Scenario 1: Seller takes care of things himself. He starts by hiring a home inspector (about $450) and a pest inspector (about $110) to first find out what needs to be fixed.  Then he on his clock, on his terms, gets bids from his vendors and hires whomever he finds more suitable to do the repairs. HE IS IN CONTROL. And once he is ready to sell the house, he will provide a "Clean Bill of Health" to the buyers by providing them with the inspection reports and the repair receipts. In this scenario, he will get more $ for his house in a shorter time and will avoid surprises and headaches. 
Scenario 2: Seller will do no inspections or repairs prior to putting the house on the market. Not even the obvious things he is aware of like a not working garage door or broken, leaking fence or leaking water faucet. Buyer hires a home and a pest inspector to inspect the house. Inspectors will prepare reports and hand them to the buyers. Buyers will review them and gives those reports along with a list of repairs he wants seller to do to the seller. By this point, we are probably  at day 15 of a 30 day escrow. Seller is in a shock because he didn't expect all these things to be wrong with his house. Now he has to start looking for roofers, plumbers, handymen, garage door opener repair guys, landscapers, pool guys and find out how much they charge to fix things. And seller doesn't have all the time in the world to get several different bids from several different vendors so he will end up taking what he can which might not be the best bid after all. Trust me:It's hectic and stressful and it's less money in the pocket of the seller. 
Am I making  sense? 
Let me summarize it again this way:
Scenario 1:
Seller does repairs on his time/on his terms/with vendors he likes/chooses = Seller is  in control = More $ in seller's pocket + quicker/less stressful sale. 
Scenario 2:
Buyer does the inspection then asks for repairs = Surprises for the seller = Seller is not in control = hiring the first repairman available or accepting the first estimate = less money in seller's pocket + more stress. 

Now, a home inspection is pricey, about $450. In my opinion, it's worth every penny and, the seller  will  get it and then some when he pays for it and take care of the repairs himself.  But if he doesn't want to invest that, then at least I suggest spending  the $110 pest inspection and taking care of what pest inspector suggests. (And of course take care of the obvious things he knows are in need of repair. 
See, pest inspectors (among other issues) will let you know if you have leaks under your sinks (very common), loose toilet bowls or leaks from them, termite (not very common) and dry rot (very common for outside of the property due to rain/sprinklers), present or past existence of rodents in the attic/garage and crawl space (if there is one). I highly recommend hiring one. Sometimes folks step over a dollar to save a dime. We see it in real estate all day long.  

I hope this helped.