There has been some more legit Mustang prototypes listed on eBay! You can find the links below!
RLC Ed Watts Mustang FEP Prototype
Custom Mustang Prototype
'65 Mustang Convertible Prototype
'65 Mustang Prototype
RLC Blue Stripe Custom Mustang Prototype
Good luck bidding! These are out of Bruce Buar's personal collection. He is a retired Hot Wheels designer!
