1969 A body 340 exhaust manifolds

I have seen them in the $500 range at swap meets and when I pick em up to look at they have been welded up or have issues like cracks. Not saying that they're no good but I put em down and keep looking. I bought a single one last year, dude wanted $300. I think we settled at $250 . So they're out there but not cheap. Moparty show and swap meet is coming up in two weeks and I'll be interested to see what the prices are .