Was there some point in time when most people switched from cantilever brakes to V brakes?
Is that a 7 speed? I always have trouble counting sprockets from photos. But the crank looks a lot newer than a 7 speed wheel. The Ebay posting photo shows an 8 speed brifter, but a friend of mine uses an 8 speed shifter on a 7 speed cassette, so that is a possible combination.
Front shifter has a bar end shifter that looks like it might be missing some of the parts, the shifter part of the front brifter probably quit working.
Since the V brakes do not have a travel agent and the brake levers are normal cable pull type levers, I suspect that one or the other (or both) were changed at some point in time.
But, I built up a new bike last spring with an 8 speed cassette, so you can't put too much credibility on a bikes age from the components if it was built up by someone outside of a commercial shop. I also used a 90s vintage rear derailleur on that newest build.
The Brooks saddle might have a date code in it, but a saddle could sit on the shelf for a few years before getting installed.