First, welcome to one of the best car groups on the internet!
Second, welcome to potential ownership of the Datsun 311.
You've probably already researched the car's history, first out in 1962, last sold in 1970.
I started on a '66 Austin-Healey and share some of your enthusiasm for the British version of this car.
ABBC3_SPOILER_SHOW
(Don't let anyone tell you the MGB came first.)
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Looks like rust will be your biggest concern on this baby. Based on some of the body features in the photos, this is actually a 1968, titled as a 1969, which was common practice back then. That's the sort of thing you'll need to know come parts buying time. My first 311 that I bought 40 years ago was also a '68 titled as a '69.
In my opinion, $1500 to get into a running 311 is a good price. But the next question is what are your plans? If you're planning a full restoration, my experience suggests researching and finding a more expensive example in better condition. It's cheaper for a buyer to acquire a seller's investment in good work and a more solid car.
If this car is intended to be a driver, say, to get you into a new brand and model of vintage sports car, then it looks like it'll be a good example to learn first-hand all about the 311. But, if you won't be doing the work on your own (as with, perhaps, you did regarding the MGs), I'm back to the idea of finding a more solid example to start with. The purchase price would be higher, but as a Grand Sum you may spend less getting it to the roadworthy and cosmetic condition you envision.
Your timing is good. If you buy this car, do just enough to make it safe and roadworthy for this summer, drive it as much as time permits, then decide what you want to do. There's a huge file of testimony from people wishing they'd bonded with their car to help
(or prevent!) pouring project money into it.
!
