I recently acquired a large quantity of very flexible stranded
stainless steel wire at a garage sale.
was wondering if this
could be used for wire antennas for HF.

Of course it could be used. The resistance loss is insignificant. It will
actually increase your SWR bandwidth. Certain Comercial Ham antennas use a
fixed resistor to improve bandwidth and lower SWR. So go for it and see what
happens.


73 Gary N4AST