2 pretty SA 12 D4, wired on a nice well known budget amp. So you have a rest of 250 $ for nice 0/1 gauge wire for power, ground and BIG 3, some fuseholders and ANL fuses (1 fuseholder and fuse comes with the amp, and some wood for the box.
800 $ spend
im buying a aq2200 for 350 from a local guy. but i dont know what sub to get...
The SA´s are still a good idea them can take a lot of power.
But a single quality 15 will likely play lower than the SA's.
OP - I would look into a DC lvl 4 15 if you have time to burn. If not, look into a DD 3515
In the want to sale section he can get a used lvl 4 with lvl 5 softparts D2, but if he order one now idk when he want to get his subs.
The orderlist is long at DC in the moment.
PS. And i would recomand an XL for the AQ amp