As in any major decision, gather as much information as you can to make your decision. You seldom make money when you sell a property, but rather when you buy it.
Lynn911 Dallas Realtor & Consultant, Loan Officer, Credit Repair Advisor
The Michael Group - Dallas Business Journal Top Ranked Realtors
If the trees aren't large and it is truly land locked except for access through the owners property, it may only be worth 3 or 4 thousand an acre. But if the owner can give an easement through his property and if there are great views from the ridge, it may have a lot more value SOME DAY, but not any time soon since there are so many beautiful lots on the market with roads and utilities already established.
Hope this helps.
Better Homes & Gardens Real Estate Metro Brokers - Ellijay