they are well made.
the shanks have a somewhat "squarish" edge that some find objectionable.
full sets of mid-range SAE open-ends are going for $39 - $69 minimum bid / asking price on ebay right now. what they are actually SELLING for is another question.
easco 8 pc $20 + $22 shipping
thorsen 6-pc beaters $17 + $13 shipping
s-k 9 pc rough $26 + $9 shipping
fleet 7 pc (very similar to your challengers) nice $30 + $10 shipping
tekton 14 pc angle heads snazzy $36 + $6 shipping
thorsen 6 pc v-groove $34. + $10 shipping
s-k wayne 7 pc fair shape for age $45. + $11 shipping
thorsen 8 pc nice (if the chrome doesn't fall off) $40 + $20 shipping
ebay search only takes me back to mid-November. I excluded snap-on, mac, matco, blue-point, and craftsman from the search
YMMV
