How many times do you think you'll use your sword? But people have no problem throwing down $600+ for it to sit in a closet. Guess it's the glamor factor.
Just be glad you don't have to keep up uniforms like enlisted Marines. They have a specified number of white and green t-shirts, green/black socks, dress socks, and DRAWERS, MAN'S: cotton, white, pair that have to be maintained, to include proper markings.
I didn't bother trying to convert my old Alphas, and no other priors I know did. As mentioned above, I don't remember much in the way of savings so I just held on to the old one for sentimental reasons. That and I have grown several coat sizes since boot camp. I do recommend buying at least one new set of green pantalones to match your new coat if you don't convert the old ones.