As you can see below, there is a great deal of variance in each category below. This is due to the fact that a car might be in fair or good condition and yet still need considerable work to bring it up to top condition within it's respective category.
Be aware that restoration of E-Types is a very time consumming and expensive affair. I know many owners (myself included) that have purchased nice cars for serious money only to end up doubling or even tripling their initial investment in restoration.
Series 1 OTS price estimate:
Poor condition: $8,000 - 15,000 US
Fair condition: $16,000 - 24,000 US
Good condition: $25,000 - 40,000 US
Very Good condition:$40,000 - 60,000 US
Show condition: $60,000 - 100,000+ US
Your pics of the car are pretty but will reveal virtually nothing about the car. With an E-type it is especially important that you inspect it personally or have someone else who knows what they are doing inspect it on your behalf. Very early E-type S1 cars with "flat floors" and outside latching bonnets command a premium - perhaps another 10-20%.
Hope this helps.
Randy '68 OTS