Supposedly, the only Marantz 22XX series receiver that was the strange bird was the 2270 ... 70 watts per channel to 8 ohms and 46 watts per channel to 4 ohms ... just the opposite of what you would expect. The 2325 and 2330 at 125/130 wpc respectively were warhorses, as you alluded to. You may wish to check the Vintage Asylum at Audio Asylum for more info. Bald Eagle (Jerry) is the Asylum's resident guru of most things vintage and Marantz, if you want to email him. Another name to know is Bill at Music Technology who specializes in vintage Marantz repair. If you win the auction, your 30 year old Marantz will probably requiring some servicing, even if it is only cleaning/replacing bulb fuses/upgrading the power cord.
Regards, Rich
Regards, Rich