The best dupe I have found for Nars Orgasm is Nyx Pinched. Ulta carries it, and it is much less expensive than Nars Orgasm, a little under $6.00 as opposed to $26.00.
Nyx Pinched is a little pinker than Nars Orgasm, but, aside from E.L.F. Candid Coral, which is even less expensive than Nyx Pinched, this it the best dupe that I have found. There is a slight gold shimmer to Pinched, which gives a bit of a glow to the cheeks. I use a primer and then a foundation and then powder over that, so when I put the blush on last of all, it stays for the whole day.
What about you? Have you found less expensive dupes of more expensive products? Care to share with the rest of us bargain hunters?