Hi Shadarn
Sorry about your dad.
From what you have posted of the collection it looks like there are a number of reissues in amongst some original copies. With selling records it’s all about condition so will help when selling to give an accurate description and you can google how to grade them. Would defo suggest you give them a listen to make sure they jump, crackle or pop & visually grade them.
How many records are there? If not too many you could try selling on eBay - give a good honest description, clear photo etc.