The value of your timber is determined by several factors, such as size, quality, species and the distance the purchaser must transport the timber to a particular mill. The estimate given to you by the TMBR app is an estimate based on averages to help you make a more informed decision based on market conditions. You can put your timber up for sale with or without an official inventory from a forester, however you will likely get more bids with one. You can request a forestry inventory through the TMBR app at any time and list to your timber for sale in seconds.