This is a 525 square meter property for RD$80,000 or about RD$150 the square meter. Whether this is a lot or not will depend on what infrastructure the property offers. If this is in a residential area where there are good power and potable water supply installed, and good roads, it could be a good price. If you do not have any services, I would check into it further.
We usually recommend that you rent in the area before purchasing a property to see if you really like the area.
Also, to check prices, you should ask the neighbors what they paid, or for how much a recently sold lot in the area went for.
Checking into who your neighbors will be is also very important, especially if you will be an absentee owner.
Also see the links on Real Estate (left side bar) in the DR1 Legal section at
http://dr1.com/legal/index.shtml