I just bought a super nice used Dell laptop off BisMan last week. The guy picks up clean used units at the ND State surplus dept. and refurbishes them with updated memory, solid state drives and installs a new version of Windows 10 Professional. Its got an i7 Intel processor, a high end graphics card, 8 GB new memory and a 512 GB solid state drive. It's got a bright clear 15.6" screen and full keyboard with number keys. It has built in wi fi but no web cam or blue tooth but I never used the web cam on my old Toshiba in 5 years and I added a blue tooth plug-in for about $10. The solid state drive makes this so fast it's amazing. The only thing wrong with it is that it could use a new battery as the old one only lasts about half an hour but I never unplug it anyway as it just sets on the end table by my recliner 24/7. It looks and runs like a new unit and I love it. It's a business level unit that sold for around $1,800 4 or 5 years ago and that was without the solid state drive. I paid $275 for it and when I checked around for new computers with similar features I would have to shell out around $800-1,000 for a comparable unit. I saw several other nice units on BisMan for about the same price but this one was an exceptional deal.
Edit: When I looked for a different computer my requirements were: i7 or equivalent processor, minimum 8 GB RAM, top level graphics card, built in wi-fi, minimum 15.6" screen, and a good brand name solid state drive. Regular SATA hard drives are super cheap and most new computers now days have 1 Terabyte size or bigger but solid state drives are so much faster that there is literally no comparison between the two and if you have one you will never want to go back to the SATA drive. Solid state drives are more expensive especially the bigger ones like the 512 one I got so some people are going the route of two drives, a smaller cheaper solid state like a 126 GB for start-up and running the operating system and a big 1+ Terabyte SATA for cheap data storage.