It's two samples of 15. 13/15 and 14/15 successes. Much too small to draw any conclusions. It's even noted a larger sample size is needed

Best place to pickup 2nd hand?

ebay.com taobao.com

Here's how it works with a few examples: https://ofn.org/sites/default/files/resources/PDFs/Opportuni...

Not really, your own personal residence is exempt for capital gains (250k single, 500k married).