Every now and then I’ll get a message inquiring about a custom offer I left the person months earlier. Just now I got a message about an offer I made three years ago! The offer was still open, but I’ve changed my rates a lot since then.
Fortunately the seller didn’t buy the custom offer. He messaged me first. But he could have bought it and then I’d probably have to cancel it.
I’ve decided to make a note on custom offers that I will keep them open for one week and then withdraw. And say if they’re interested after that they are free to message me.
An exception is if the buyer has said when they’ll get back to me on it.