Hi Mike,
I carefully cut the string ties with a razor blade. I save the set's internal foam rubber packing and cut slits in it for each figure in the set in case I want to return the figures to the box at a later date. As someone who collects toy soldiers for the love of the hobby rather than as an investment, I am not sure how much, if any, the set's value is reduced by their no longer being tied in the box. However, generally speaking, I would suspect that being tied in is preferable to not being tied in. As far as investments go, I believe you will do much better over time investing in the stock market and real estate as compared to toy soldiers.