Agent Aquarium gives consumers a better way to find the right Realtor® by providing the ability to search for and select Realtors® using MLS performance data. Choose the right Realtor® based on your needs. Choose Listing Agents by number of transactions, Average Days on Market, Percentage of Sold Price to List Price. Choose Buyers Agents by number of transactions, Buyer Closing Costs Negotiated, Percentage Negotiated Off of List Price.