I got a refurbished Harmon Kardon HK3470 100wpc receiver from harmanaudio.com for $188. Sounded nice for the money. Slightly lacking in bass depth and weight and highs had an artifical sheen on complex harmonics like violin. In the range of Teac or Creek 4330 for a lot less money.
Don't know about headphone output jack.
Don't know about headphone output jack.