It's hard to see in that small photo. But I'm guessing that the bike wasn't ridden very often. (And the angled saddle says that it didn't fit that well for the original owner, so that's another reason to leave it in the garage.) The bar tape looks quite new, with no loose wraps or scuffs near the end of the bars. See how much wear there is on the brake pads to indicate miles ridden on that set of pads. The bike computer might have an odometer display to see the total miles. (and like a previous comment mentioned, the single bottle cage mounted on the seat tube, instead of the more easily accessed slanted "down tube" also indicates casual use.)

How hilly is it where you live?
The drive train has quite high gearing, for fast efforts on flat roads, but not really low enough gears for effective hill climbing. It might be a 52-39 front and a 12-25 or 12-27 cassette. The front chainrings and each rear cog should have a stamped tooth count number (or just count the teeth!)

The low gear ratio of 39 front - 25 rear is a ratio of 39/25 = 1.56
Or if it's 39f-27rear: 1.44. That's possible.
Typical gearing a few years later was 34 front - 27 rear = 1.26. That's a 20% easier low gear than the 39f-25r, almost 3 shifts of the rear easier. A significant assist on steeper climbs.
My 10 year old bike is 34 front - 32 rear = 1.06. it's 47% easier! That's huge.