Breaking Blocks

recently picked up a much sought-after block of 4 (these are cinderella/labels, not actual postage stamps).



being cinderellas, and being from that unloved step-child state of Yugoslavia, the actual demand from them is not tremendous. however, there is some interest in these, and I do know a couple of people that I could probably make quick sales to. I am considering breaking up the block and selling the other 3 (which would most likely put me into positive cashflow, as the 3 individuals will probably sell for more than my cost for the block).

so, knowing that there will probably be a great demand for this issue as a block, would you break them up and make the quick sale?