Have a Blueline Velocity T4 available for $85. Never had running but are supposed to be very quiet.
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BlueLine Velocity Pump T4- 1225 gph 18' max head
The worlds quietest and only titanium centrifugal pumps. They are made with noryl housings and impeller, titanium rotor and separating wall, ceramic bearing ball, carbon graphite bearing cap and EPDM o-ring. Designed for all saltwater applications. Backed with a 18 month no-fault warranty on manufacturer defects, the Velocity Series water pumps are highly energy efficient and ultra-quiet (less than 30 db). They are high performance and feature "Dry Run Cutout" with thermal switch for added safety. Velocity Water Pumps feature sealless/leakproof designs and are made with noryl housings and impeller, titanium rotor and separating wall, ceramic bearing ball, carbon graphite bearing cap and EPDM o-ring. They are rated for temperatures to 140 F and line pressures to 50 psi. All pumps come equipped with 3/4" male NPT threaded inlet and outlet, T4 comes with 1" hose barb, mounting bracket, and 18/3 SJTWA 6' power cord.