Got a used $5 McCulloch Trim Mac 12sii from Habitat for Humanity Restore, was looking for replacement until I figured out how to restring it, Walmart has the Hyper-Tough for ~$24, and Menard's has the Worx for about the same, otherwise check eBay...not sure if all qualify as 'bump head'.
And I'd like to think even though corded is a limitation, I'll adapt to it, 40 ft for the weed eater, and 75ft for the snow blower, thinking I'd like to get a corded mower next, but I'll try to find a cheap or free just to see if it's something practical for me. Snow blower is great, just made sure to get as large in diameter discharge chute as most of the online complaints were of clogging.
I did get a second $5 used Black and Decker GH900 trimmer, but the motor whines and I still have to figure out the cure or cut it loose.