Pic 1: Drillmaster #60745 4-1/2" angle grinder with dust shield and cutting wheel, 4.3 Amps...$15...GB2..Also I have 8 new 4-1/2" metal grinding wheels, $10 or $5 with grinder...GB1
Pic 2: Chicago Electric 4" angle grinder, works perfect, with wheel guard, side handle, and manual...$20 ...GBab
Pics 3-4: Craftsman #900.245420 4-1/2" angle grinder with side handle, wheel guard, and new grinding wheel. Works and sounds fine, and pushbutton shaft lock has been replaced with a bolt and spring (see pic), which still does the job...$20 ...GB2
Pic 5: Milwaukee #6082 9" sander/grinder, good power, works perfectly: 13 Amps, 5,000 R.P.M...$70...GBb