Is this a good deal for a set of Rallyes?

I have found a set of 14x5.5 Rallyes with rings and center caps for sale. I don't believe they will fit my 71 Valiant with 4'' bolt diameter. I believe these wheels are 4.5's.

Anyhow I'm considering buying them anyways for another car I may be getting in the future.

The guy wants $300 dollars for everything and claims they are in immaculate condition.

Is that a decent price?

Thanks

Sam