It’s a solid rifle that shoots a wide variety of ammo very well. I’ve had mine since around 2008 and was my first bolt gun after getting out. I didn’t know much about the civilian LR side of things and just went with the first factory rifle with a good accuracy guarantee that I found...on a GI Bill budget lol.
Had a CDI Precision DBM added to it, installed a bipod rail, flush cups, and got it threaded for a brake.
The only downside to the A3G, or any FN SPR for that matter, is the lack of aftermarket accessories (if you like to tinker about). Pretty much stuck with a MCM stock or MDT ESS chassis, not that those are bad lol.
As for that price, no idea why it’s up that high. A dude on here just sold his for like $1400, which was a great deal for the buyer. I paid around $2100 for mine (new) in 2008 and the price went up a bit after that.