I am new to offerup. However I've reached out to 3 sellers and no response. One seller I made an offer of asking price plus the $5 shipping that the platform recommended. No response.
Other two sellers no response. No interaction for all 3 items interested. 3 strikes and you're out. One of the items listed 2 days ago. The others within weeks.
This platform should police itself to remove users / items that don't respond.