The pair will probably run around $50 if not a little more. Depends on your local market. Don't feel as if you need to get all the fish at once, and..do you have a QT setup? No sense in having done all this work to get the tank cycled only to run into a parasite, disease, or nutrition problem.
My advice, get the rest of the rock you want and put the goby into QT. By the time the rock is ready the goby can come out of QT and then you can add whichever type of clown pair you want for your tank and put them in QT, on that trip you can buy the pistol shrimp and put it into the display for the goby.
My advice, get the rest of the rock you want and put the goby into QT. By the time the rock is ready the goby can come out of QT and then you can add whichever type of clown pair you want for your tank and put them in QT, on that trip you can buy the pistol shrimp and put it into the display for the goby.