That appears to be a very nice looking copy.
I am very hesitant to spend big money on an ungraded comic, and I am fairly good, but not perfect at detecting restoration. My personal limit on such items is $500.
I definitely would not pay more than 7.0 restored value for this book, even after a thorough inspection and page count, that's after 45 years in the hobby.
If it is a reputable dealer, you should be able to get a resto guarantee, but most reputable dealers probably wouldn't sell this ungraded, there is potentially too much money on the table.
Some restoration is very hard to detect, and nearly impossible from pictures.
If this is ebay, I would be extra wary, there are a number of sellers who deslab restored books and sell them as raw unrestored.
You are swimming in the deep end of the pool.