Primarily Petroliana Shop Talk Forums Shop Talk Petroliana Forums Petroliana Value Questions Big Sinclair Double Sided Sign

I came across this sign through a guy I know. I'm not a sinclair guy, but a good friend of mine has always liked them, and wants to buy this as his first big porcelain sign. It has the bracket included. I know condition is everything, so can someone help give a rough value of this? Any help would be greatly appreciated. Thanks in advance.