Larry Newirth and Dan Cathell spotted a white BMW 750 sedan on June 17. Then on Friday they found a late-model Honda Accord.
Police say the cars were stolen and abandoned. No arrests have been made.
Newirth, a 63-year-old retired carpenter, jokes that he and Cathell better stop finding cars or the police will think they're the ones stealing them.
Cathell, a 44-year-old millwright, says he hopes the thieves stop dumping the cars from the boat ramp off Churchmans Road near New Castle before police close the dock to the public.
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Information from: The News Journal of Wilmington, Del., http://www.delawareonline.com