What can you swap for a Kew gardens 50p?

I've been trying for a while to get a Kew gardens 50p to complete my 50p collection. I was wondering if anyone was interested in swapping for multiple coins?
Thanks, Steven

You might want to hold off for a little while as there is a Kew boom where its value has doubled in less than 6 months, but I have a feeling it will drop again.

On the other hand, with less and less becoming available, the price will continue to rise.