Hi, I saw your question has gone unanswered for a long time. There are a number of factors that determine value, including the nature of the land, location, and zoning options available. 53 acres off of 191st in Westfield (zoned Ag) sold for $1.4M in June. I see that there are 24 acres available on 193rd St, listed for $1.2M.
Let me know if I can help you find more information on this investment!