Ask for recommendations for a used laptop on any tech forum and you are sure to get a recommendation for the Lenovo Thinkpad T420 . These laptops have almost a cult like following, and for good reason. They are easy to find, affordable, make a great daily driver, and are nearly indestructible.
eBay store I bought this laptop from: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=11&pub=5575159861&toolid=10001&campid=5337833996&customid=&icep_store=southeasterndata&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg
120GB ADATA SSD ($47): https://amzn.to/2rycN0r
Amazon Affiliate link(US): http://amzn.to/1qPQhgO