These 2 ads are a scam.
https://yupyi.com/listings.php?page=1&keyword=nsr%20250

These bikes were sold by Tim Hope (Moto2 Import) a longtime ago. The pictures are the same as in the original ad, same mileage.
If you have a Mr Paul James Brighouse working on an oil rig answering and asking you to make the transaction via Proceed shipping in Seattle,
DO NOT CARRY ON !
These are scam. The site for Proceed Shipping is very well done but there is nobody neither in Seattle nor in England.
They say they cannot show you the title of the bike for legal reasons !

This one is also one : Same divorced lady asking to be payed in bitcoins.
https://registersigns.com/bike/honda/nsr%2B250/nc/raleigh/140842758
https://registersigns.com/bike/1990%2Bhonda/nsr%2B250/fl/clermont/71481458?from=http://txt.bz/h4L1TLt

I hope it helps
And I am still looking for an 1990 MC21