The day I bought a 'retina' tablet for $120!

Recently purchased a Cube iWork8 Air dual OS (Win10+Android) tablet from eBay for $120. At a dpi of 1920x1200 / 8" , it's what Apple would call a retina display. Watching 1080p movies on the tablet is really sweet...

Anyways, I budgeted about $75/yr to operate my laptop (electricity cost). I'm hoping instead of using my laptop, I could put $50 of it towards the tablet, and $25 towards powering the tablet for 1 yr. Doing this for about 2.5 years will have covered the cost of owning this tablet.