Yep, same experience here, very good results with DELL Latitude E7240, E7260 and similar. Very rugged and Linux works like a breeze - on eBay from $179 (just checked again).

One is well advised to upgrade them to 16 GB RAM and put in a 1 TB SSD, and possibly a new battery. My better half wanted one of those again after I gifted her a brand new MacBook Air, so used she got to the DELL and Ubuntu running on it.