that car looks in excellent condition, high mileage is to be expected in any car from 1960, mileage should be the least of your worries, a Jaguar MK-2 in that preserved condition is valued in the range of $25-$35 thousand buckaroos if not $40 to $45 grand. I've seen a few showroom-condition examples of the MK-2 selling for $60 grand in Miami.
sure you can find better deals, there's one for sale for $1,500. dollars in Orlando, but it's a heap of rust, good for some parts. And if you want to restore one of these, expect to spend in the range of $60 grand for a total of $61,500.00. The interior alone will cost around $8,000 to fully restore.
for 9 years I searched for a similar condition 1960's S type and I finally found one in San Francisco, I had to pay the asking price, the owner would not budge. He showed me written offers, he rejected all of them, so I put a cash deposit down and went back home to raise the money. NOTE: only 24 thousand Jaguar S type models were made between 1963 and 1968, and 80% of those have by now dissapeared, whether by fire, crash, parting-out, etc., there just wasn't room for haggling. Sometimes you just have to pay the price for a choice-condition classic car.