"but she wants one with the standard eighty-eight full-sized keys and one that sounds as much as possible like a piano, without all the expensive features like drum machines and gizmos that make it possible to sound like a kazoo on steroids or Jimi Hendrix's electric guitar on overload, merely at the flip of a switch. Just piano is fine" (Don)...I looked in vain for one with the voice of a concertina, but the inexpensive Yamaha I chose does have the accordion and many other sounds that are fun to try occasionally as I practise my repertoire - although it's mostly on organ for hymns, and piano for folk.
"As far as I know, the 'Indian' ones were originally introduced there by missionaries from here, and by happy coincidence were very suitable for playing their music." (Smokey)...yes, Indian musicians like the hand-pumped ones - playing just the tune with the other; for what it's worth, I play just the tune with 2 hands, and would like to try a foot-pumped one, one day...