Sheet of us postage Christmas stamps 1975 ghirlandaio national gallery with Madonna and child on it what if any is the value?

Answer 1

This doesn't entirely answer your question, but let me point you in the right direction.

In 1997 one pair of the imperf was listed as $110. That was for 1 single pair of them.

Hard to say how much a sheet is worth. Whatever you do, don't tear the sheet apart, and selling pairs, you might end up devaluing it. I'd contact 2 or 3 reputable stamp dealers and have it evaluated. If you don't have stamp dealers in your area look up, on the internet, stamp clubs in your area that might be able to supply you with proper contacts.

Don't simply sell it on eBay or anywhere until you get it valued.

Answer 2

Probably only the face value of the stamp. Rarity give value and these are not rare.