Onelegduff: THANKS and wow! I m also regularly changing there when in town. But from USD to riel, luckily.
Was it the desk at the right side from the entrance? I assume so.
As for the 2% difference: 2% was pretty much the maximum fluctuation of the USD/Riel rate in recent years as far as I remember. I recall larger fluctuations about 10 years ago. The difference between a bank rate (my bank) and the market in PP was about 10 riel maybe 15 in December. Thus, I share the concerns of other posters about the 2% difference. Unless much has changed in the last few weeks, the changer offering 2% more is either losing money, using fake bills, or, in a best case scenario, laundering money.
Still, the info on changers in the market might be helpful. If the rate is just a little better it is worth it alone for keeping pressure on the exchange rate. I know individuals have little impact but that does not mean giving up that impact.
