Summary

In Escrow.sol line 43 there is a check for the arbiterFee if (arbiterFee >= price) which is less gas efficient than price < arbiterFee since two op codes are executed for greater than or equal to versus one op code for less than.

Recommendations

Change line 43 to

If creator feels the equal check is important here they may want to ignore this gas optimization, but the escrow could still be valid if arbiterFee == price though neither buyer or seller would receive any funds on a dispute, only the arbiter would.