I'm going MS, and unless I'm missing a big hit somewhere, well into MS. It's nearly impossible to judge these from photos, especially with this kind of (beautiful!) toning, but I see no hint of rub on the reverse. On the obverse, there's just no telling without shots from multiple lighting angles, or seeing the coin in hand.
This isn't a series I collect so I'm not sure if the grade is correct. I didn't remember seeing anything that would make me believe it was a 61, the only thing I noticed was the mark on the right side of the obverse on the "wall" below trust. I'm considering buying it but this isn't a cheap coin in MS and if I bought it I'd want to cross it. Would you pay $360 for this?
I guessed AU55 because it looks like wear on the leg and boob. However, since ANACS called it MS61, I'm guessing there is no wear, but rather a lack of toning like we see all over the rest of the coin. To answer your question, Numismedia puts your coin value at $222. However, the "full head" designation and the unique toning would add a premium to that. I don't specialize in SLQs, but I'm guessing the asking price of $360 is still a bit high. If it was me, I might go as high as $300 if I planned on saving it for a long time and never selling. Again, I'm admittedly not an SLQ specialist, so others may chime in here.
I'm guessing that might be a type 2. I think if it's a 61 it's a fair price, but if it's a 58, then I'm in the hole even more after grading fees. I just don't know the series at all and don't even know what the difference between a 58 and 64 are.
The coin is a Type 1, for sure. the problem is, I LOOKED AT THE WRONG MINT MARK!!! Wow...rookie mistake. The correct pricing on Numismedia for a 1917-S type 1 is $300. So, I'm changing my story completely. With the full head designation and unique eye appeal, I'd pay the $360 your seller is asking for.