Fair amount of time to wait for buyer contact?

"Sold" a car on friday evening and to give credit, did get an email with "when suits to pick up car" shortly after however have heard nothing back since. Sent emails from my email and also used the trademe payment details email to send a message, just in case my email was going to spam.
Left phone numbers, etc each time and no response.
What's a fair time to wait! Don't want to be a dork and jump the gun placing bad feedback to get their attention, or get tm involved. But at the same time it's not a small item and they did outbid another party which is pretty annoying if they back out!
What's the general opinion!! Thanks

I'd have thought 3 days was long enough.Weekend may have caused a bit of a problem if buyer had to "raid the bank" for the dosh but surely they should have communicated the fact to you.

I'd start jumping up and down say midday tomorrow.

Maybe place "Blue" feedback tomorrow afternoon saying you'll change it when trade completed.

Look back on their feedback and see if you can find a phone number to contact them .