After months of researching and watching Renoir documentaries, Markow reached out to Sotheby's, which referred her to an art appraiser who has been working in the industry for the past 43 years ...

Heidi now believes the work was created in the 1800s and is a portrait of Aline Charigot, Renoir's wife. She hopes the Wildenstein Plattner Institute, a non-profit dedicated to preserving art ...

They met up later and he revealed the not-so-hefty price he paid for the pieces. MORE: Renoir painting worth up to $182,000 stolen by suspected 'professionals': Police "I said, 'What did you pay ...

Markow bought the painting for $12, and when she got it home, she noticed a faint signature on the drawing that resembled Renoir’s. There are other clues as well, including a stamp on the back ...