Is there an option 4: keep looking?
How much (miles) will you be driving this car, and how much risk are you willing to accept? As with any car, take a detailed look at it or take along someone who can. Does the car look like it was cared for? Are there obvious oil leaks around the heads? Weird grinding noises when driving? Etc?
Option 1: $9K feels steep. the timing belts and pulleys *can* last a lot long than the 100K change interval. My 07 outback was basically your option 2. 160K miles, $6K, but I got lucky in that it detailed service records. It had never had a belt change, however so it was the first thing I did. Everything I replaced looked like it had lots of life left in it. So if you're willing to gamble and especially if your daily drive mileage is low, this car could last you a while as is
Option 2: as I mentioned, this is similar to what I bought. 160K miles is, in my opinion, where Subarus go from low maintenance to high maintenance. Despite all the maintenance my car received before I got it, I've replaced: some CV axles, head gaskets, timing belt and pulleys, the engine itself, wheel hubs, etc. I still need to replace suspension parts. Coupled with the lack of records for your vehicle, it may be too much risk. Very carefully inspect this car before you consider buying.
Option 3: not sure where the scam is in this? Option 1 is a dealer car for $9k with an old timing belt, and option 3 is a small dealer car for $9k with a new timing belt. Seems better to me!?