$50 was a steal
It's dropped from $100 when I first saw it two months back and it's still there.
Would you be willing to buy it for me?
Great advice from various members about how to deal with old UG cassettes. Let me add my 2 cents to the mix:
OP, if you purchase a 9 speed HG cassette and modify the sprockets to fit your UG freehub body, you can use the 9 speed HG spacers (no modification needed) and should be able to fit a total of 8 sprockets on your 7 speed UG freehub (13T UG threaded plus 7 HG sprockets). Switch your 7-speed indexed shifter to friction. Friction shifting on HG sprockets is amazing.
Just another piece of information to consider.