This wheel is not from a Subaru STI although it does share the same bolt pattern, but is a accessory wheel for the WRX and was the same wheel that was given with the US WRX "Sport Package" (https://www.subaru.com/guides/wrx/my..._Sport_Package).
Subaru Part Number: B3110VA000 (wheels), 28821FE141 (center cap).
17x8
5x114.3 bolt pattern
55 offset
~20 lbs
https://parts.subaru.com/p/Subaru__/...3110VA000.html
List Price for the wheels at the time was $1,587, did pay 10% less. Expensive, but thought I would be keeping my WRX for a long long time but ended up replacing it with a SUV a few years later
It does come with tires mounted, but they are factory Dunlop Sport Maxx RT from 2015 and should be replaced. There is tread left if you are don't mind driving on old tires.
Wheels are in good condition, but 2 of the them does have minor parking curb rash which occurred when almost fully stopped. Did try a touch up paint repair on one with OK results. Hard to see any issues from a distance though.
Asking $850 for the set.
Thanks for looking!