Thinking of a WC T-5 swap - Toploader value

I'm thinking of swapping my Toploader in the '65 (no K code) with a T-5. Toploader works fine and doesn't leak. Any idea what the value of the Toploader (complete with Hurst shifter) would be if I were to try and sell it? Wondering how much of the cost I can recoup on the conversion....

Thanks,

Troy