A VZ24 action used as a basis for a custom rifle re-barreled in 225 Winchester is about as much a C&R firearm as a fiberglass T-Bucket hotrod kit car is a classic automobile. The value can be a wide range depending on the quality of workmanship. You could have a $100 "Bubba" special, or a fine custom rifle worth much more. Your best chance would be posting pictures, and a description with as much accurate information as you have in the Art of the rifle section on TFL
Cheapshooter's rules of gun ownership #1: NEVER SELL OR TRADE ANYTHING!