Kenwood 500 watt 4 channel amp. sell or swap .

I have a Kenwood 500 watt 4 channel amp, 1 channel is brdgeable so can run speakers & a sub. I am wanting a decent sized monoblock or 2 channel bridgeable amp with at least 300 watts rms or even a decent active sub or why? Try me. Or sell the amp for 40 Texts only before 8pm please.