Regardless of its' location, if the chip is a lot bigger than 3 inches than most glass company firms will tell you that you need to replace it. If the chip is smaller than that, it can usually be fixed. The important thing is that you do not get talked into replacing your windshield when it is not necessary. If you suspect that a simple front window repair job would suffice, get at least 3-5 opinions before making the final call.
If you don't want to get on all-fours and do your floors, an office cleaning service will do it for you. Not only will they sweep and mop, they will wax, buff, deep-clean and do your carpets. These are maintenance tasks that most of us aren't up do, and few of us have the gear to do ourselves. Some services offer floor stripping and sealing as well.
Improving the kerb appeal of a house is unlikely to add much to its value but it can help to get buyers fix auto glass through the door to help you sell it at the right price.
Check with your insurance, because it's likely your insurance will pay for some forms of windshield chip repair. They may even waive the deductible, since repairing your windshield is so much cheaper than replacing a windshield. Should you need total windshield replacement, you may have to pay a deductible with your insurance.
Another way to figure out ARV is to get an appraisal from a certified appraiser. Yes this costs money, but if everything else looks good about the deal and you are uncomfortable with the realtor's comps, you can always get the opinion of another professional. They go more in-depth when appraising properties then realtors might. However I only trust the appraisal when I actually hired the appraiser. This way I know that I have given him/her the instructions on how I want the appraisal to be completed.
Taking immediate care of cracks in the windshield can save you a ton of hassle later. So it's better to invest in a smaller amount of money now than a huge amount of money later.