I inherited a true to original restoration 1935 Ford Deluxe. Help me out here.

[1935 Ford Deluxe]

Hi y'all. Thank you for letting me into your community. I have a few questions about this car and I am hoping someone with much more knowledge than me can help out. The original owner has passed and I want it to end up in the hands of someone who will enjoy it because old cars are not really my thing. He really enjoyed it though and even took it out in parades within the last few years.

The owner was pretty meticulous about his restoration projects and keeping them original. The only thing I am noticing that is not original so far about this car is his bolted on battery holder under the hood. The paint and body work all seems great aside from a weird spot on the rear right pillar. I don't know much about old cars, but it started right up with some new gas and a battery. I have a few questions before I move forward with trying to sell it.

We started it, but his after market (under dash) oil pressure gauge was not really reading anything at idle and probably less than 5 PSI with a little gas so I turned it off until I can properly test the oil pressure and/or make sure the oil gauge is reading right.

1) My first question is how can I test oil pressure in this car? I don't know where the filter is, but the oil looks good and is appropriately full. If there is low pressure, is the oil pump the first thing to replace? If it is more than just the gauge is it worth diagnosing or should I sell as is? Id bet it actually does have good pressure just by knowing the previous owner, but I can't ask him now so...
2) What do you think this car is worth? And where is best to try to sell it? Is there some good auction site for old cars? From what I have seen on auction sites it might be up to 30k?
3) The Body is #48. I don't know the VIN yet, but can you tell what model this is?
4) Is there anything else I should know about this car or about selling it?