listed house that i feel i could get much cheeper with dealing directly with owner

[John Oitice]

ok so here is the story there is a sfr in my target area listed for 105k needs tons of work and was built in 1860 so updating is a must the comps are around 220 and taxes around 8k now from talking to the owner directly it seemed as though a cash offer of 75k would buy the house. now here where it gets stupid the house is listed with an agent so i set up an appointment through my agent put in an offer of 75k with a 30% down payment and a 10 day closing the listing agent without calling the owner to even ask told my agent no way and pretty much hung the phone up on her. now 3 or four days go by and i run into the owner at the store and she asks what happened i thought u liked the house i told her what happened and she's now angry at her agent because she liked my offer i guess my question is any way to get around an agent just out for her personal commission and not the interest of the seller