Lately been looking to add to my vintage collection. So many to choose from and in that range there's even more. Definitely go for the one you want and if there's something special about this one that you really really love then go for it =)
If it is a dial scratch, I personally wouldn't go higher than $350. If it is the crystal, that's a fair price in my opinion, given the amount of visible wear. I'm presuming service history is unknown.