i did a simple search so that i could speak fact instead of fiction. here are the legit numbers. you are in columbia. you are looking for three seventy five list price. i searched by price, area and timethree fifty to four hundred single family homes and over the last six months here is a fact 48 properties meeting the stated criteria sold for a total of 96.5 percent of list price at time of sale. the average subsidy given to a buyer from seller is 6,121.
your agents suggestion was about 88% of list and 8percent lower than average sold price to list price ratio. your agnet made a good suggestion.
Sellers normally express their dismay with a low offer by electing not to respond. By doing so this puts you in a position of making a counter to your own offer without them commiting to a number other than the one they are selling it for.
Why did you not take your agent's advice and make an offer at $330,000. Generally, agents have a pretty good feel for the local real estate market and what builders are will entertain for pricing.
Our recommendation, if you are still interested in this property, is to speak with your agent again about their best recommendation.
I hope this helps!