Hi Alex, I really don't mind the removal of a tank, except for the time it takes to remove it and get it inspected. Some sellers will give credit and others are like Amanda said in denial. I had a deal in Roselle we tested the soil prior to purchase and it showed normal levels of contamination. We proceeded with the deal, but my Tank Guy who did the soil test guarantees the removal for an extra fee with no extra charges for contamination. So, we were covered just added the extra cost in my budget. It ended up have no contamination even though there was a small hole in the tank. Another deal we did in Union we had the same 1K Tank but didn't have the guarantee and what do you know cleanup was 20K which the seller gave a credit for and we proceeded with the deal otherwise we would have walked. Just remember in NJ if the house was built between the 1900 and the 1990's, there is a good chance the property had oil heat at some point. So make sure you do your Due Diligence on every deal. There are signs to look for with underground oil tank such as a visible vent and/or filler pipes, disconnected oil lines coming through the foundation wall which was the supply and return lines from the heating oil tank, a concrete channel may be visible in the basement floor that leads to the furnace area. Any of these physical signs is a good indication of a tank that has been removed or, there is still a tank in the ground. Hope this Helps Good Luck!!