MARTHA'S VINEYARD MARKET UPDATEA BUYER’S MARKET is when there are more homes available than buyers looking.A SELLER’S MARKET is when there are more buyers looking than homes available. How to determine if it is a seller's or buyer's Market. In general, it’s a seller’s market if inventory is adequate for 5 months (or less) worth of sales. If you have 5 to 7 months of inventory, you have a...