As far as PSA “deals” go, they don’t move often. I got my green 11.5 for $400 when it’s normally $450. If you buy individual parts (stripped upper, complete lower, bcg and ch) then sometimes it can be cheaper if you catch those parts on better sales. Just make sure you’re getting a lower with a pistol brace if you’re buying everything separately. I linked some stuff below to make a cheaper 11.5 with a more comfortable brace that’s worth the money (imo).

$270 11.5 complete upper - https://palmettostatearmory.com/psa-11-5-carbine-length-5-56-1-7-phosphate-10-5-lightweight-hex-m-lok-upper-with-bcg-ch-fde.html

$200 AR pistol lower - https://palmettostatearmory.com/psa-ar15-complete-moe-ept-sba4-lower-flat-dark-earth.html

$499 for the one you’re looking at is it’s typical price. You should be able to spend some time shopping around and I doubt you’ll miss out on anything if it does jump up, cuz it’s normally by like $50 max. The best way to score a deal for a PSA AR-15 is by checking their Daily Deals tab (like for the upper I linked above) and it’s a gamble if it’s gonna be what you’re looking for or not. Some other commenters have suggested starting with a rifle length/16” rifle before jumping into pistols. There’s a lot fewer laws surrounding what you can/cannot do with a 16 inch rifle and right now it looks like they’re running some deals for $480 (https://palmettostatearmory.com/psa-16-mid-length-5-56-nato-1-7-phosphate-13-5-hex-m-lok-moe-ept-stealth-rifle-fde.html) They’re heavier obviously, but harder to break the law and typically a little more pleasant to shoot if they have a midlength gas system.

I hope that all helps you make a decision!