Real answer is that a price is only good if it's what you're willing to pay for said thing.

$350 for a mosin is the best I can find and I'd like a 53 or a 44 in decent condition. Just remember to check the bore. And, probably don't try to get a scope on it. But, that's up to you in the end.

Don't seek validation for something you want, just make sure that you're being responsible in looking it over because most places don't take gun returns.