Looks like the generous outpouring of help and advice has subsided. Many thanks.
Summarizing to make sure I didn’t miss something important and to give future gifters a simple summary w/o having to read though the whole thread.
First. Consider talking to the young lady about her experience and specific interests.
Doing that. But the conversations are not proving as fruitful as they might be.
Second. Confirmation that DSLRs from several model generations back are likeliest to hit the budget and provide building advantages. In the Canon tribe, fingers point to the D10, D20, with a possible reach to the D30, or to the lighter Rebel series, around the XSi, XTi. In the Nikon tribe, a lot of fingers pointed at the D40/D40x/D60 and the D3100. Pentax and Sony also sneaking in here. I’m pointing Canon simply because extended family in area has Canons that can be lent in future.
Third. Used Oly Pen series, particularly the E-P1 or E-PL1, as most likely available in, or very close, to the budget horizon. After this, regardless of what I do for her, I’m considering getting one for myself.
Fourth. One of a set of Tough cameras: Oly TG series, Panasonic TS30 and similar, Ricoh WG series. This genre of cameras had completely escaped my notice and have much in their favor for likely abuse in everyday use.
Fifth. A number of other P&S or compacts – the SD 780 among them.
Sixth. Other mirrorless, ILCs, 4/3 etc, like Fuji xe1. Nikon v1, Sony nex3n, Sony nexc3. Attractive, but all above budget used – as of this date.
Seventh. Go film and prime lenses. No worries, not going there NOW because of the operational costs, financial and other, of film, but I have a closetful of Oly Oms and Canon FDs, bodies and lenses, ready to lend her if her interest grows.
Eighth. A lot of good advice regarding dominant features to consider in making a choice.
Miss anything?
If reading this in the future, consider that specific models and price ranges will change with time.
Thanks all.
Giorgio