I would say no, its not worth it. Why? Well the OP says "I have a Trex bicycle that I purchased around 1994. I always loved that bike. It has about 24 gears, if I recall correctly." Its Trek and how does a bike have about ?# of gears. Sounds nostalgic but suspect the bike hasn't been ridden (let alone seen the light of day) in years. Now with the pandemic the owner wants to pull it out of storage and ride it again. But I question whether after getting the work done, the urge to ride will have passed, and it will go back into its dark hole again. I also understand the supply of new bikes is constrained right now and repairs are taking weeks. Hate to rain on someones parade but!