Buying off your registry because of sale?

Ts
Has anyone bought something on their own baby registry because it went on sale? I'm really wanting this bottle warmer that has great reviews. It's normally $70 and is now in sale for $40. I didn't want to get it off the registry in case someone gifts it to us, but then, most people don't follow registries anyway...
More than half of the stuff I need on my registry are on sale!! It's so tempting...