I'd rather have the Scorpion for the same cost. The Scorpion will most likely retain a much higher resale value then the PSA AR-9 and it's a much cooler weapon overall!
I can put together a decent AR-9 for around $500.00 which is half the price of the PSA and I couldn't justify spending $1000 on an AR-9 just because it takes Scorpion mags since glock mags work fine, are readily available and can be swapped with a backup pistol.
PSA has really jacked up their prices on everything since the beginning of Covid. There are much nicer options out there for a better value.