A few people have been scammed on the site, Only use paypal to pay for items for sale by other members. If they will not use paypal, its likely a scam NEVER SEND E-TRANSFERS OF ANY KIND.
from what I understand the 750S sidestand will fit the 750X and it is a little shorter, you can find ones on ebay made in china for a fraction of the cost of a honda one. lots of guys lower there 750x and use these sidestands from what ive seen on FB groups