Couple of things to be wary of.
I recall a couple of people talking about the Autotechnica seats which are often on ebay and offer from memory a nissan adaptor or easy universal mounting. They were considered of average quality and comfort. I'm not sure what or whose the the ones you picture are but if they are cheap generic like the Autotechnica they may be a let down.
They also look wide. Be very careful here as the ford seats only just fit. If the Ford seat was 20mm wider it would not be a good fit, they are that close. The seat belt receiver just misses the centre console and it is a tight squeeze to use the flip mechanism. This is not an issue as such with the ford seat, it all works, but if that seat pictured is any wider then i think you will have problems getting it to fit right. Then can you get mounts or make mounts.
I was going to make mounts, I'm a sheetie, but the Hurracan ones are so good and easy I couldn't be bothered.
What are they worth. You can easily get cloth XR seats for about $250 a pair. Mine are XR8 the same as pictured in Jamie's post.