Tested quoting 20% more on the next three proposals

I raised my retainer quote by 20% on the last three proposals I sent, no change to scope. Two said yes without blinking. The third went quiet, and I still don't know if it was the price. Before I decide anything I need to separate the number from the person, so: when you raise a price, do you change anything else at the same time, or keep the offer identical?