My wife and i dont buy eachother gifts. We just go out for a nice meal together.
We actually only buy gifts for each other's birthday. Any other man made holiday like valentines day , xmas, fathers day, mothers day, buy-a-gift-cuz-we-are-making-you-feel-bad-if-you-dont day we dot bother.
We figure buy stuff when you need it throughout the year.
Works for us. Might not for you.
I know anniversary is a bit different but i think we put too nuch pressure on ourselves to have to buy buy buy