There are numerous posts about exchanging US$ to Kyat (including mine 14Nov 2010), but nothing about the reverse transaction (in order to offload any residual Kyat prior to leaving Burma).
I assume that the Kyat is like the kip, reil and dong, and worthless once its left home.
Intuitively, a really poor exchange in one direction (US$ to Kyat) should result in a good reverse transaction (Kyat to US$).
Any suggestions from recent visitors to Burma about the best place in Yangon to exchange Kyat back to US$.
re: money changing at Summit Parkview
If the travel shop/money changer in back is closed, the souvenir shop will gladly handle money changing duties, assume they will do it in either direction. They can give 5000 kyat notes as well and their rate was only 5 kyat lower that the regular changer in back, 875 kyat for US $100 bill, a bit lower for smaller bills.
We initially changed a big chunk with our travel agent upon arrival in Yangon, and she said that she would happily change anything leftover back to US $ at the same rate (880 kyat=$1US about four weeks ago), so should be fairly common practice I imagine. FYI: rates upcountry varied wildly, 850 in Nyaungshwe, 750-780 in Kalaw.