I lost one of imne Sporasub Elite and at the shop they told me that it is't worth buying only one for 2 reasons.
1. The cost of one is the same as the pair
2. The other fin will be totally different that one you have got. If you buy a new one it will be stiff as you were at the beggining and if you buy used one..well someone could swim twice as much as you do and you will have 2 different fins.
My suggestion buy a new pair. I did so..and now i'm a proud owner of Gara 3000ld
