That is one of the new updates to the price guide (which really isn't outdated). It's not to be confused with the armors like that (the two d-parts armors which give 10 atp and 35 atp) or the other s-parts 1.17 which does nothing special. S-parts 2.01 is a shield that gives 15 ata over max, at only a level 17 requirement, and it's over 1/10k drop to get. A high level char would want to use red ring instead sure, but s-parts 2.01 is insanely good for a lower level cast and it's an extremely rare drop. Kroes is possibly best armor in the game and that is only cheap because they are a lot of them around and they are really easy to get, especially in events; kroes also used to be 80 pds when it was a difficult event only drop, and if it was as uncommon and had a drop rate like s-parts 2.01 it would be way more than that. The price seems fair considering usefulness and rarity, even if there are better options when at much higher level. I actually bought one a long time ago for my hucaseal, but it's not something that is traded a whole lot. The reality is that this is probably the only one for sale, and will be the only one for sale for quite some time; if you don't want to buy it at whatever price the seller wants to charge then feel free to go hunt it at 1/10,000+.