I found a Blade at a thrift shop few years ago and later sold it on craigslist. I believe I sold it for around $175, but I don't know if I could get as much today. It was an entry-level road bike, but seemed solid and reasonably well made. Lugged steel frame, Shimano SIS derailleur, lousy brakes, etc...
If you can do the work yourself, I'd say "go for it!" Paying a shop to do it will probably cost more than the bike is worth.