Kenwood KAC-7285 "600 Watt" Amp $100.
Not sure on specs, stereo amp, can be bridged to 4 ohms mono.

MTX Blue Thunder PRO502 $75
50x2 RMS at 2 ohms@12.5 volts
100x1 RMX at 4 ohms@12.5volts
Underrated like all MTX amps, great for highs or a small sub.

Streetwires 8 gauge Amp Install kit Part#PS08R $40
18' Power Cable
5' Ground Cable
16' Remote Wire
1 fuse holder
1 60A fuse
Ring terminals, cable ties etc.