Depends on the steel, to be honest.
If it's an old (like pre '70's old) blade, there's about a 99% chance it's good quality, L6 steel. If it has tungsten carbide tipped teeth, then no, it'll be useless (probably
)
Without knowing the quality of the steel it's impossible to say. Not all sawblades are created equal
If you know for a 100% FACT that it's L6, I'd say it's a fair price. If y'aint 100% I'd say spend the $110 at Jantz or Texas Knife Supply and buy a load of proven, top quality 01 toolsteel.