Some years they are dry and some years they are flooded.

Dry rot can affect wood.

to me its a health hazard unless involved indecent *sexual* exposure. ie, an adult parking his/her car outside of an elementary school or anywhere for the matter with genitalia unclothed would likely be a sexual offense however the same person into their car at the beach parking lot caught taking off their wet trunks and slippin into dry trunks, or vice versa, or maybe even urinating in the nearby bushes isn't sexual (except to a sexually obsessed society that loves to associate natural nudity with sexuality).i notice at alot of the beaches' changing rooms around here in socal, alot/most of the guys walk around freely naked and even aroused. must be a western thing?

Will they cause a cavity as they decompose, or will their decomposition just create soil or something?

I understand it might not be cut and dry, but at least if I stick to the "deal breakers" I should be "safer".  

Thanks all, and I agree this has been an interesting discussion, from what I thought to be cut and dry to a cloud if gray.

Asking price is $1,000,000  Below are a few of the details about the facility6 Gin San Self Serve Bays with new electric drying system 1 Automatic Drive thru Laser wash 4000-REBUILT Wash Select II Auto Teller with cash/credit card acceptance Standard Change Maker dual change machine Gin San Reverse Osmosis “Spot Free” machine Water softners with 2 alternating tanks for production and delivery Air Compressor 6 vacuums,( 3 regular, 2 fragrance combo, 1 carpet shampoo 6 drop shelf vendors for product purchases Compaq PC for credit card processing ScanCoin Currency counter Semacon Coin Counter 16 channel DVR plus 9 cameras with remote viewing capability Honda Power washer Full supply of tools, ladders, etc Inventory of spare parts and chemicals,Roadside Marque sign

Problem is if they remove it and find it was leaking, or any contamination in the soil nearby, then it can be very expensive to remediate, and at that point, you have spent the money and probably won't close, so you're out of pocket and did the seller a favor, which sucks.

Possible hidden damage in this area.Recommendation: Chemically treat the soil at probable entry points for the control of subterranean termites.Remove any termite shelter tubes from accessible area.

I look in the Somersworth, Rochester, and Farmington are, but as far as the MLS those seem to have dried up recently.