I think any time is a bad time if you want sensible money.
That said, there is always a market for a certain size/type so if yours falls into that bracket, then yes, you should be able to sell.
I'm looking for one at the moment, but not for much - I always set my limit at £500 for an unbacked 4 / 5yo. I find usually the nativey types sell a lot easier because adults will often buy them as well as kids, so it depends what you have. If you're up NE Scotland way then let me know!