Rookie Dilema

I'm trying to sell my deceased father's old system in an estate sale but can't find any info. It's an RCA MGT 67W receiver (big footprint), RCA MGL 22W turntable and RCA XFK 23W speakers (big footprint)-an integrated system from the '60's. He kept it serviced locally (out of business now) and it sounds great. Any ballpark swags? Thanks.