I almost sent the seller an email advising him that I thought his price was 50% too high - seriously !
I know what it cost me to restore mine, and I had a good base, and an excellent interior, and the purchase price of mine was not too far from the starting bid.
The first 300 is not as collectible as later models, mainly because the engine was lower on power, and the brakes are non-assist drums -not that the vacuum assist brakes were much better.
I am happy to talk to you about the costs involved Des, before you decide. Is the radio console with the car, and the radio ? If not, and you do go down this route, I can help you with both, as well as a number of parts sources. There are some other parts I can see missing, such as the wind deflectors on the front and rear doors. Are they with the car ? They are very difficult to find, and expensive.
Some costs you might be interested to know. Panel & paint - assuming nothing too major - $10 - 12,000 minimum, new leather interior $10,000, woodwork restoration $2 - 3,000 minimum. Re-chroming - depends on the severity, but budget for at least $5,000. So far, that's $30,000. Value when complete ? Perhaps $50,000 depending on quality of restoration. I have a massive file of receipts for mine that I am too scared to total, but believe me, it is a job and a half to restore one of these chassis cars.