Boudicca Scherazade, 47, allegedly became obsessed with Laurence Roche after spotting him on his furniture stall in Wimbledon, London.
She sent photos of underwear and messages saying she was in love with him, and followed him around markets, it was claimed.
Ms Scherazade denies stalking.
St Albans magistrates were told how Ms Scherazade, from Middlesex, obtained Mr Roche's contact details from business cards left on his stall.
Her stalking campaign started after she gave him a bunch of flowers in 2013 and it continued until May 2016, it was said.
Prosecutor Clinton Hadgill read samples of the messages allegedly sent.
One included a photo of a pair of knickers on a rug with the caption "I've taken them off just for you".
In other messages, she is said to have told him: "I need your love so bad, can't live without you..."
It was claimed Ms Scherazade followed Mr Roche, who had a partner and child, to various markets and car boot sales, "continually" walked past his stalls, took photos of him and "caused him embarrassment" by shouting at him.
In the TV series Storage Hunters, Ms Scherazade, of Garrick Villa, Hampton, travelled the country with other dealers hoping to find a bargain. She appeared in the show in 2015.
She pleaded not guilty to a charge of stalking without fear, alarm or distress.
The case continues.

Tunnicliffe, 24, worked with Wigan boss Warren Joyce when he was coming through the Manchester United youth system.
Browne, 19, made his professional debut in the Europa League this season and has also played in the EFL Trophy.
"Marcus is a young player with great potential and will strengthen our group," said manager Joyce.
"Ryan has got a terrific attitude first and foremost. He has built up considerable experience now in this division and we are confident he can be a really positive influence to the group in the immediate future."
Both players are available for Wigan's Championship game against Brentford on Saturday.
Find all the latest football transfers on our dedicated page or visit our Premier League tracker here.

Alistair Roy missed a good chance to give the hosts the lead early on, pulling his shot wide.
Jonathan Page tested Shire's Richard Barnard with a close-range header and nodded another effort over.
Kinnaird fired in what proved to be the winner after increased pressure from the home side in the second half.

On Monday the Wall Street Journal reported he was being investigated by the US for possible drug-trafficking and money-laundering.
Mr Cabello dismissed the accusations, saying no proof had been offered.
In March the US imposed sanctions on a group of Venezuelan officials.
Venezuelan opposition leaders and US officials have previously made similar accusations against the governments of President Nicolas Maduro and his predecessor Hugo Chavez.
Mr Cabello is both president of the National Assembly and the second most senior official in the governing Socialist Party.
Last month he filed a defamation suit against 22 people linked to various media outlets who had republished details of the US accusations.
Correspondents say he sees the accusations as part of a campaign to discredit the country's socialist achievements and to destabilise it months before a parliamentary election.
The US has sanctioned at least 50 Venezuelan government officials whom it accuses of drug-trafficking and human rights abuses.
In December, President Barack Obama signed a decree classifying Venezuela as a "security threat".
Last month the 11 members of the Alba group of Latin America countries urged him to repeal the decree and made clear they backed Venezuela.
Thousands of Venezuelans marched through the streets in December in protest against the US sanctions against Venezuelan officials.
One of the stars of reality TV series Storage Hunters stalked a market trader for three years and bombarded him with explicit messages, a court heard.
[NEXT_CONCEPT]
Wigan Athletic have signed midfielders Ryan Tunnicliffe and Marcus Browne from Fulham and West Ham on loan until the end of the season.
[NEXT_CONCEPT]
Lloyd Kinnaird's second-half strike helped East Stirlingshire defeat East Fife on the opening day of the Scottish League Two season.
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Venezuela's parliament has passed a motion defending its president, Diosdado Cabello, against what it described as "a campaign of lies by national and international media".