Colin Patterson, 51, is the latest person to be jailed following the undercover work of group Dark Justice.
During conversations on the internet, the sex offender asked for sexual intercourse, sent pictures of himself naked and arranged a meeting.
Tim Gittins, prosecuting, said the vigilante group had set up a profile on the website Badoo as a girl named Tasha.
“They were careful that contact was initiated by the defendant and he contacted the profile in January,” he said.
“It was made clear to him immediately that he was conversing with a 14-year-old and asked if that was acceptable to him.
“The defendant’s conversations moved quickly towards sexual matters and asking to meet her.
“He asked her about her experiences, including how he would like to teach her in relation to sexual matters, and was asking for oral sex and sexual intercourse.”
Mr Gittins said Patterson went on to send two pictures of his genitalia which was part of the 120 pages of conversation between them.
Attempting to meet a child following sexual grooming.
“In police interview he accepted he was responsible for the conversations and he said he had arranged to meet her but it was just a bit of fun,” said Mr Gittins.
“He claimed he would have sat her down in a cafe and said do you know how stupid you are doing this.”
Sentencing him to two years in jail for attempting to meet a child following sexual grooming, Judge Penny Moreland also placed him on the sex offenders register for 10 years and made a sexual harm prevention order, lasting for 10 years.
Shaun Routledge, defending, said: “He does not seek to blame anybody but himself and there are clear indications of remorse.”