Tell us about yourself!
Not really sure if it's worth the effort. For $200 you can get new laptop with current OS and SSD and new good battery. While you were lucky to have some parts donated. I'm not sure how many people have a legal copy of WIn 8 laying around waiting to be installed. but $50 on eBay is a bit of money to spend when trying to get an old computer functional. IMO it would be a challenge to get much of the equipment you used for less than $100 and that is assuming you already had a working laptop with good battery. A new battery could quickly eat up another $50. So OS @50 + battery @50 + $100 RAM & HD and you have a functioning old computer with slow processor.